Best Integrated Amp to Pair with Audience "The ONE"

Hi there,

So I've just acquired a pair of Audience "The ONE" bookshelf speakers.

My setup is simple and my space is small; I play mostly classical, rock, country and jazz from a desktop system. And I am currently driving the speakers with the PS Sprout. My previous speakers (Elac B6s) were a lot more musical...and while the "ONEs" are clearly more detailed I do feel like they're also less rich.

Would another desktop integrated amp perform better? A Peachtree, perhaps? I should say that I'm looking to spend under $1k and that the footprint should be small.

It's also possible that this is just what these speakers sound like and no integrated amp will "solve" the problem.