You could easily hang on to see if Emotiva releases that UMC-1 for $699 (loaded 7.1 wiht HDMI, EQ, HD video upscaling, and HD audio codecs), then add an amp - either from them or used multi-channel for not much north of $1k, total! This is probably your best bet, even though you'll be spending over $1300 for all of this new. I think it's worth it, as a minimum for quality speakers like you're using. That's my recommmendation for best bang for buck for your setup, potentially, with all the latest processing.
The other route is buying a current av receiver, with otherwise good quality sound (Like the Harmon Kardon AVR354/254, with latest 7.1 everything), and add an amp.
Traditionally, however, separates AV pre's have typically offered a bit better potential sound, if better dynamics, usually. But, I've had good results here with Yamaha and HK receivers, used as pre/pro's from their pre-out's.
Still, for $699, I'd wait to see what you can get with the Emotiva, and wait a few weeks or so.
For the record, in response to your comments on B&W recommending a "minimum" of 50-150 watts amplification, those are just that, minimums. It's a kin to saying you should use a minimum of 87 octane gas in your car. It will perform much better with higher octane!
Especially when you consider that typical modest sensitivity passive speakers (like your 805's at, what 88db?) need all the dynamic help they can get, you should consider separates, running the speakers as "small" on your processor/receiver (which vastly improves dynamic capability of the system), and a good high current amplifier. If you're trying to keep everything near $1k total, you'd be restricted to used multi-channel amps on the market, and limited to what comes up in the $400 range, at best. If you can squeeze more money out, you can get a bit more amp, of course.
For the record - and I've been selling receivers for years - I'd never be spending over $1k for a "receiver", as a stand alone unit, no. Unless was some killer deal I could resell, I'd be looking for a better combo, because I know what the performance appreciation is, looking elsewhere.