Recommendations please for good, affordable pre-amp for system?

First choice would be Audio Research LS3, second the John Curl designed Parasound Pl/d2000 or Pl/d1000, the Adcom GFP750 is another contender. All should be available used for around five bills with the pl/d1000 being about half that.

Donzi, Quicksilver makes a small tube pre-amp that is both relatively inexpensive (especially if you get one that isn't a remote control model) and of pretty good quality. And it might put some flesh on those bare bones sounds you will get out of your Bryston/Thiels units. At least that will give you some kind of an indication of what you system will sound like with a good pre-amp. And, after hearing that you can make upgrades to improve on it if necessary. And if you don't like it and think you can do better it should be easy to sell. FWIW I agree with jmcgrogan whose comments reflect my experience with the Thiels. Personally, in your place I would buy an Integrated Amp with good current and modest power (note my comments in a previous post about power requirements) and forgo all of the torture you will endure in trying to put together a competent system at this stage of your audio experience. Even if you were moderately experienced in audio and audio equipment I think you would find what you are doing as daunting and frustrating. 

I would also suggest that you do some reading about  Audio so you can better understand what is going on in selecting equipment, setting it up and evaluating what you have accomplished. I recommend Robert Harleys book, "The complete guide to high end audio". 

Good luck

Congrats! Enjoy your audio/video processor!

@donzi, you're all over the map here.  My best recommendation would be to establish a relationship with a local dealer and borrow a variety of equipment so you can listen to the differences for yourself and best figure out what you tend to prefer sonically.  I think this advise will save you a tremendous amount of time and money in the future.

That said, I think the Thiels are excellent speakers, but difficult for all but the more high-powered tube amps to drive well.  Those tube amps won't be available at the price point that you'd be looking at, so that leaves solid-state amplification.

If I were to recommend an integrated, I'd think the Plinius 8000 or 9000 series would be a good choice, but consider also Classe, Electrocompaniet, NAD master-series, Yamaha AS-2000, or one of the older Musical Fidelity integrateds, just to list a few.

Ultimately, though, audio preference is a personal thing, and you will likely find your own preferences will evolve over time.  So the more equipment you're able to listen to, the most informed you will be both in terms of the differences (or lack thereof sometimes) of the various electronics, but also what you tend to like sonically.

Good luck, and enjoy the journey!

Michael

I just picked up a Bryston 11b (same family as the 0.5b, but with more features).  It is replacing a Pass DIY B1 buffer which "pani" suggested.  I also have an Aikido tube preamp I purchased on Agon.  All of the above were purchased for sub-$400.  I'm running a Belles 400 power amp and Klipsch Fortes.

All three preamps sound good.  I was running the Pass over the Aikido because the sound was cleaner and to my ear, more involving.  The Aikido has more euphonics and texture, but to the point of distracting me from enjoying the music itself.  It was more natural to toe-tap with the Pass than it was with the Aikido.

With the Bryston, I'm getting a more pleasing form factor, a nicer (for me, at least) volume setup and a built-in phono stage.  I didn't do extensive side-by-side testing, but I believe the Bryston is more similar to the Pass than it is to the Aikido.

If you have a limited budget, I don't think it's a bad thing at all to buy a 0.5B and use it until you have more funds to upgrade.  If you buy well, you'll at least break even, as Brystons hold their value well.