Josh,
With the OP's active speakers (as well as with many of us who have very good main and surround amps) the smaller amps in a receiver are either redundant or less viable. For the OP they are absolutely unusable (the speakers have built in amps that are tied to their crossovers and not bypassable).
The receiver market leads with most of the bells and whistles; the pre/pro market follows on, sometimes with a more refined or detailed capability (the 905 mentioned above is a perfect example; it has the feature set, but none of the balanced out capabilities of the later released pre/pros). I used a Denon 4806 receiver as a pre/pro because it had some features I wanted in my HT, but the amps were clearly sonically inferior to the McCormack and Krell amps I was using as mains/surrounds. Later, the Brystons and Carys came out with the same feature sets in pre/pros and I went that direction.
Currently, pre/pros like the Integra DTC9.8 and the Onkyo pro version (the 885) handle True HD and DTS-MA decoding. They are scarce as hens teeth (I'm number 3 on one dealers wait list for the 885). I own the Cary Cinema 11A and that company has a product strategy to umbilical its pre-announced 11V video unit to it. It's still vague as to how and where advanced codec decoding will be done (player, Cary boxes, if so which one, etc.), so I hedged my bet with an order for the reasonably priced Onkyo units.
The advanced codec decoding is a topic for considerable discussion out there. Few sources/players decode all of them; few processors/receivers decode all of them; even fewer manufacturers have clear directions on which way to go. Aren't standard wonderful...and so many to choose from!!