best solid state integrated to match with B&W 685s


Hi folks, I am new to Audiogon but love the site. I am just starting out on my trip to audiophile heaven, and currently I have 15 year old Yamaha gear (RX-485 and cheapo CDP). I bought the B&Ws in August and have been researching ever since.
The room is small, 14x12, and my music is intensely varied, from Snoop Dogg to Aphex Twin to Vivaldi. What would be the best integrated amps to start auditioning?
I am planning to eventually build a system with an external DAC and the Wadia iTransport, so am looking very hard at refurbished Deccos...Also considering the NAD C326 BEE, the Cambridge Audio 550a, the Music Hall A25.2, and a used Creek 5350SE if I can find it cheap enough.
Budget is under $800, has already been pushed to the limit.
realremo
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Thanks Bob.

I listened carefully to one of the new NAD amps set up well yesterday, and came away impressed. Now thinking the combination of the C-326BEE with the 685's would sound great in a small room. Actively, crossed over as recommended by Bob R with a musical sub it could be very, very satisfying. Would be a clear upgrade path.

Bob's suggestion of an active speaker system with sub and DAC/pre combo is also interesting.
If you like the Rotel, let me know. I just put the RB-1582 and RC-1580 in the classifieds late last night. Both of them together retail for $2798. I paid around $2400 and I'm asking $2000, but would consider going lower. They have less than 50 hours and are in absolutely perfect condition as they were purchased brand new at the end of July.
Bob, I was reading that good transient response will help the sub sound more musical when used in a stereo music system, and that transient response is much more important with music than it is with HT. But I have also read that transient response is too subtle to be detected with the typical ear. So what makes a good sub in your opinion? As I browse the dealers' showrooms listening to subs, what am I looking for, besides an on-board active high-pass filter or crossover? What are the specs...?