Power amplifier for NHT 2.5i speakers?

Thanks for the responses so far. I've tried to stay away from budgetary concerns since I wanted to Feel users approach in this concern.
I forgot to mention that my (living and dining) room is about 14.5 ft. by 24 ft. The speakers are located along one of the narrow walls. There are two wide windows (like 6 ft. each) in one of the long walls. Now the room opens up into the kitchen at the opposite side of where the speakers stand. It is a 7 ft. wide opening that extends around 11 ft. from the side wall and it is the kitchen. But the room also opens up into a corridor adjacent to the kitchen and around 4 ft. wide.

Adding to the above paragrarh, the ceiling is at 8 ft. high. The construction is concrete slabs with glued parket flooring. Walls are sheetrock on metal studs.

Daveyguitar:
Can you comment on the bass performance using the McCormack DNA 0.5?

Well, I am crazy but I am playing the NHT 2.5i's with a pair of Wavelength Gemini Twins now, they play better than the Parasound, Better bass, with 2.5 watts per channel!!!!
believe or not, and the sound, a lot more quality.
I had bought a pair of Silverline Sonatina's but I like the sound with the NHT's.
I think I'll have to get something else, more efficient, like 96 to 98 db/1 w/1 mt.. But in the mean time I can enjoy it.