Reply to Numark CM200USB

Alright, so like every one else im Djing off my computer. My current set up for outputting all my sounds (Tracks, Mics) is kinda complicated because i need to use a digital preamp that i can route out through my computer and then i need to use a analog mixer to connect my MIC, MP3, and all my back up cd stuff.

http://www.numark.com/cm200usb

I came across this beauty which i believe might do EVERY thing im looking for in a mixer. Usb conections)which can be set as master or a line incase you still want to mix with your controller), phono, line, 1/4inch and then rca/usb/xlr outputs. As you can see this would solve my problem of having to use two preamp mixers. However im unsure of how many different virtual ports i can make via usb and latency of it all. Has any one used this before?