Help choosing Power Conditioner


Completely new to this area. I would like a unit that:
a) regulates power, keeping it within the 120v range.
b) provides good and long-lasting surge protection
c) can be used with a power amp as well as preamp, and sources all together
d) Hopefully helps the audio, making it more open and dynamic without negative effects.

I need to say under about $750 used. My candidates are:
Monster HTPS7000
Monster AVS2000 (how are these two different)?
PS Audio Power Director 3.5
Blue Circle MR1200 Music Ring
Any others...
Thanks!
kck
I'm back. Thanks for the responses, please keep them coming. I am sorry the thread went downhill so fast. I agree that DA basically posted an ad, and browsing Agon I see he has done that in other posts as well. Whether this is ethical or not I will not judge, but if I understand the rules correctly then it is certainly questionable.
Snofun3, you have a valid point and made it with your initial post about DA. Also appreciate the info about the Monster gear, good analysis there. I will look into the AVS2000.
Anyone with experience on the Power Director? I understand it does not regulate. Also another one, Belkin PF60 - any opinions /experience?
I'm a fan of the balanced power units which include the likes of equi=tech, exactpower, bpt, blue circle and others. Equi=tech has a terrific reputation and has been doing balanced power the longest, particularly with major recording studios. However, bang-for-the-buck goes to Blue Circle for its MR1200. I use this unit and have experienced enhanced low level resolution and quieter background; however, don't expect sonic improvements because this is extremely system/environment dependent. I demo'd another power unit that, beyond peace of mind, made no audible difference. I would not recommend the smaller BC mr800 as it might compress dynamics of your amp. Of course the other route to take is to install dedicated ac lines, a wholehouse surge at the breaker box, plug your amp directly into the wall and your sources into a hydra 2 or audio magic mini stealth. Options, options...fun hobby huh?
Consider the Powervar ABC 1200-11 toroidal balanced power conditioner. For $229, it's a no-brainer, and it'll do what the uber-expensive balanced power units do...but for considerably less. Heck, if you don't like what it does in your system, you can re-sell it for nearly what you paid. What could be less risk than that?
I will also suggest looking at some of the BPT options that may be a stretch on the old budget.

And for what it is worth, I agree that dealers or even members that may be listing something should disclose that fact and only be responding if they can be adding something useful other then an advertisement to the discourse.
dealers or even members that may be listing something should disclose that fact and only be responding if they can be adding something useful other then an advertisement to the discourse.

Hey Maineiac, if that comment is a dig at me it's unfounded. My recommendation of the Powervar is a real world, low cost, common sense approach to a widely used conditioner, and the link I provided is not an item I am selling, nor do I know the seller.

I suspect your objection is to the link to the Audiogon classified ad and not to the recommendation, so let me try this another way.

Powervar power conditioners are used by hospitals and industry. They provide power conditioning comparable to esoteric audiophile power conditioners for considerably less dough...an ABC1200-11 retails for $1200 but can be found on E-Bay or in the Audiogon classifieds for 81% less.