the quad capture appears to support ASIO via the new roland VS drivers. this should give you what you need for good recording and playback. If I read the specs right for the interface you should not need an additional sound card, and you will likely not use the on board sound capabilities of the motherboard either. the quad capture should be superior.

a word of advice. you have A LOT to learn and digest. take your time, do one thing at a time.

Have fun with your new setup, I look forward to hearing your work in the coming months...

PK