Klipsch THX Ultra 2 combined with smaller center?

I'm sort of limited by room set up, I'm in a 1200 cubic foot room and I've got a media cabinet and towers surrounding a Panasonic 58" plasma. I've got no room for speaker stands on either side of the towers so I must use bookshelves (RB61's) placed in the furniture surrounding the display and my center (RC10) is in a cabinet just under the display.

My question is, I've got a smaller center channel, the only one I can find to fit in my 6" space is the Klipsch RC-10, will replacing my bookshelves (RB61's) with the Klipsch THX Ultra2 KL-650's be too overwhelming for my little center channel?

The KL-650's will almost fit perfect in the towers, filling an entire shelf and offering a semi-custom look, also limiting the acoustic disadvantages of having the speaker on a shelf.

I suppose I could put the Left, Right and Center channel on the wall with the center above the display but there is an overhanging dropped ceiling which is bad for acoustics and I have no way of cleanly getting the speaker wire to the front 3 channels with them on the wall. Aesthetically it would be a disaster. So putting them on the wall is a last resort.

I just wonder if the KL-650's are too much and are going to make my system sound unbalanced with the RC-10 as my center....

By the way, the Surrounds are the Klipsch in walls R-5650S

thoughts/opinions???

Thanks for the advice, that's sort of what my gut tells me but wanted to get some opinions from others....

The 5650's sound great, I'm really happy with the Klipsch set up, way better than my DefTech's upstairs in the family room...

I don't think you'll be disappointed in them...

Can't explain the premium. My guess is it depends on your set up, if you've got a 7.1 system, the rears may sound strange with sound from the right rear directed to the left and sound from the left rear directed to the right. The space between your 2 rear channel speakers could be somewhat confusing. I think it's an ideal speaker for the rear channel in a 6.1 set up or for side surrounds....