Audio Research GSI75

I have been thinking about upgrading my second system. My main system is in the basement. My wife has no problem with me doing what ever I want down there. My second system (which is in a very small room, but on the main level of our home) started out as a vintage system, Pioneer SX-1280 (complete re-cap), B&W 805D, Cambridge 851n streamer, Yamaha YP-D71 turntable -w- audio-technical AT150MLX (complete re-cap), Pioneer RT-707 RTR. Nice mid-fi system.

Turns out I spend way more time upstairs where the family is than I spend in the basement. 

This space is very small (11' x 9'). But just the right size for two chairs and the stereo. So I been thinking about upgrading this second system.  

I stop at a stereo store almost once a month here in Michigan and have become a real fan of the tube sound.  In particular, Audio Research. I need a one box solution (because of space and the WAF).  The perfect choice seems to be the Audio Research GSi75.  

The question that I have are:

 - Is the space to small to really enjoy this investment ?
 - Would the GSi75 match well with the B&W 805D ? (although I could change the speakers later in the game) 


I would appreciate any feedback.

Thanks
biketony