Im using a Cambridge Audio A5 (better than the A1 imo) and some Mission 751s, sounds awesome!
I'll probably upgrade it in a few years when I have my own place, but for right now it serves perfectly as a 2 speaker media centre, I have my Wii going into it, as well as my Xfi, and will likely connect it up to some other inputs before I get rid of it.
Im very happy I moved from PC speakers
Cost me less than £200 too, thanks to the wonders of ebay!
Not quite the budget you specified, but I tell ya, bi-wired the sheer clarity and soundstation of these speakers coupled with this amp when sitting near to them is mind boggling for the price
ONLY downside is the bass isnt huge, but its controlled, and very nice, and if you use the amp EQ, it sounds fine, rather than a distorted computer EQ mess, and it brings out any nasty sound artifacts in poorly encoded music, or games.