I have the Yamaha AudioGram 6 here. It connects via USB and I love it. I am using it with Vista 32 here w/o any problems. Check the AudioGram website to see if they have drivers for Win7 64 though. The 6 comes with two mic XLR inputs and 4 mono 1/4 trs inputs. It also comes with a compressor for each input.

Trax