I'd be looking at an EP400 for better bass before I'd be looking at an amp--consider: the amp isn't pushing out bass to the mains if you're using a sub! (OK, fine, if you've got M80s crossed at 40 or 60Hz, like I do, it is, but...) I think the EP400 is smaller than the 175, so you'd be good there. Certainly you could buy about 3 of them for the price of an Arcam!

I am the Doctor, and THIS... is my SPOON!