I have the def tech 2002tl's (5 1/4" mids vs your 6 1/2's, 12" lows vs your 15's), CLR 2500 and BPX rears. I also have an M&K THX350 sub (2X12"X350w). I have the def techs set on "Large" through the receiver and run the M&K with the LFE out (based on a reccomendation from a def tech tech I called). I use Sunfire's Ultimate Receiver to power the system. Everything is run through an Exact Power EP15. I demo'd separates vs the Sunfire and couldn't find anything (new) within $2500. of the Sunfire that sounded as good, separates included (although Outlaw is a direct marketer, so I couldn't compare one).
There are so many features the Sunfire has that aren't available with separates (automatically senses where a signal is coming from and turns the amp on and to that input, multi-function programmable remote, etc.). I went on Bob Carver's Sunfire site and found that the Theatre Grand II video processor (retail- $2500.) is used in the Sunfire, as well as the same technology in the amplifier section as used in his separates, although they do share the same power supply in the receiver. Bob Carver states on his web site that if you truly want the best sound, go with his separates, but, for the money, the Ultimate Receiver out-performs anything in its' price range, separates or integrated.
Do yourself a favor and demo one- your ear is the only one that counts.