Integrated Amplifier balanced


I need some help in buying a Solid-state integrated amp. All my music is coming from a DAC (Slim Devices Transporter). The requirements are:

0. The best possible music within my budget (I listen to classical and vocal music).
1. Must support balanced inputs.
2. Dual voltage (110/220).
3. Under $3,000 used or new.
4. Solid build.

Bonus
1. Headphone output.

Greatly appreciate any advice.
audiophile_new
Sorry for any confusion. I am open to buying new or old, under $3,000 for just the integrated amp. Only, I am not going to resell it and buy another repeatedly. I don't have the expertise/time/inclination for that. Thanks to forums like this I am learning a lot but I am also more confused!

I know that the quality of sound depends on (a) the entire system/chain and (b) my ear. I cannot get to (b) unless I visit the dealers and before I do that I wanted to come up with a shortlist. For eg. Plinius/YBA are not represented in my area and I might have to travel.

I thought I simplified (a) when I decided that my entire chain consists of:

Computer/NAS->Transporter->IntegratedAmp->Speakers

It cannot get any simpler than that (except for the boombox). No matching preamp/amp, no Cd/phono players etc. I decided on solid-state because I have no idea about tube-rolling/matching.

Speakers didn't seem that difficult because my budget limits me to about $2k so I was looking at Klipsch/Usher/Wharfedale floorstanding models, all of them are <90dB sensitivity. But that is a question for another thread.

As I investigate integrated amps I realize this isn't going to be an easy process in spite of the constraints I imposed. I don't see a consensus and perhaps I shouldn't expect it.

I checked Plinius' site and realized that they have a "new" model now. Ditto with Rowland. I don't think audio is like computer chips (until recently chip technology was evolving rapidly). This is a mature field and if the manufacturer thinks they can come up with significant improvements every two or three years, does it mean there is something wrong with the previous models? I don't understand the cars analogy - I don't think the 2000 Camry is significantly different from the 2009 Camry.

I checked out the reviews in the magazines but I must also admit that I am somewhat disillusioned after reading Arthur Salvatore's opinions about the whole recommended components
mess. Too bad he is a tube/vinyl guy and doesn't have any recommendations for me!

I probably exposed my ignorance and annoyed some of you. I only insist that I mean no offense to any of you - you tried to help me and I thank you for your time.
Audiophile_new,
Your most recent post is not ignorant or annoying, but very accurate. Often times things don't change that much (and BTW your comparison of Camry's I agree totally with Accords).
Some manufacturers do change technology however. Either way, they have to stay competitive in the market, and rarely do you see one come out with a new product that is half the price. So, in your (appropriate) cynical view, if they change technology and Model '2' is $500 more than Model '1', how do you know you're really getting a better product? Truth is, you don't. If the models maintain the same technology (like our assessment of the cars), you know you're just paying for inflation, and low miles.
That said, the previous recommendation for the Rowland Concentra is a winner. There's one on A'gon now for 3k. I owned this amp 7 years ago and back then it sold for 3k used - most products' used price decrease rapidly with age, and some increase. The ones that hold their value or increase are clear indicators of their quality. It is a classic product. For speakers, while I have not heard the ones you mention, for 2k or so you can get a used pair of Tyler Linbrook monitors (which is what I used when I had the Concentra) directly from Tyler w/ warranty. This is a fantastic match, and I think you would be very well served budget-wise. I have heard so many other speakers since then, and for the money (and much more) you will be hard pressed to do better. To buy a retail-priced speaker at 2k you will probably get a much lesser product. Obviously this is a gross generalization, but from my experience it is what I have found. Further info about your room and listening preferences is also helpful.
The new Krell S 300i may be something to consider with evolution technology, a high current 150w/ch @8ohms and 300 @4ohms. It even has ipod connectivity with fully balanced signal transfer...it appears this integrated is now truly balanced in design and execution. Sound is supposed to be more holographic and dimensional with lower distortion and more accurate tone/timbre. The remote is now metal and fully loaded with functionality. Price is $2500 (china assembly) and the weight is 40lbs....now that's value!