the record spot:Not sure what your budget is, but seek out the deals on the Audiolab gear out there right now. The 8000s amplifier is around £350, but the 8000Q & P pre/power options can be yours for about £500 or so (see my post in the Hot Deals section on here). That'll give you the kick you are looking for i think and give you a very high quality amp arrangement into the bargain.
Further to the above, I see that Sight and Sound have the Audiolab 8000M mono power amp for £299, so you can be on to a pre/2xpower amp set-up of pretty impressive spec for £900 - that's a brilliant deal and its great kit too.
The mono power amps are 125w rating at 8ohm, heck, I'd be looking this one up myself I think...! By the bye, re: other concerns from Dan re: NAD and Audiolab or whatever it was, I'd be very much inclined to try out the pre/power option. Different strokes for different folks and while the NAD 355 is at a knock down price, there's not many NAD power amps going for a song, which would be a fairer comparison for the NAD when comparing like for like against the Audiolab pre/power (or pre/power/power moreso!) arrangement.