My 2 cents
I had the EXACTLY same configuration in my mind when I went to Pro-Fx two weeks back. I audiotioned the combo and found it be harsh. Then I just went to the other demo room and audiotioned Kef with Denon 2310. WOW.. we (me, my dad and brother in law) were blown away with the sound clarity and sweet sound from this combo. But it was way above my initial budget of Denon 1910 + Polk Tsi. But it was too tempting

. Then I auditioned lots of other brands -
Onkyo with B&W 684 (very exensive combo, though sounded really great)
Onkyo with Klipsch (not impressed)
Onkyo with Jamo 606 (not so great)
Onkyo with Wharf 9.5 (It was good and economical, but the sweet sound of Kef was still asking me to go for Kef)
Denon 1909 with Monitor Audion BR 5(This was sounding tooo dull. No life at all)
Denon 1909 with Dali Ikon 6(This was great but price)
Then I went back to ProFx and Auditioned Denon 1910 vs 2310. To my ears, Denon 2310 was much superior in sound quality and lots of forums also suggest 2310 is definitely worh the extra money from 1910.
Finally this is what I got
Amp - Denon 2310
Front - Kef iQ7 (This is a discountinued mode, got around 35% discount, but this sounds great)
Center - Kef iQ60C (This is an awesome center speaker. Dialog clarity for movies is just perfect)
Rear - Jamo s416 ( I had these ones before with my existing Onkyo HTIB)
Sub - Onkyo HTIB Sub. (I am planning to upgrade this to Polk PSW 110/125).
Hope this helps

.
-John