How about Epos ELS 3, Panasonic digital reciever (XR**), and a used Velodyne CHT 10 or CT100?? This is a system I would love to hear as I have never heard them but have heard good things about all of the individual components.
But let me see whats available on Audiogon..........
Reciever $140
Sub $210
speakers $225
Total $575. and from all accounts this should sound great especially for your PC
I have never heard a bad B&W speaker even though I have never owned these (I have owned the original 601 and my brother owns the CDM9 NT) and all of these were or are highly regarded components of their 'genre'