how much RAM in your pc? Do you have Firewire connections?
I'm hearing firewire is to be preferred over USB.
I'm shopping for interfaces right now too
If you're considering the Lexicon, maybe check out this Mackie too.
http://www.musiciansfriend.com/produ...ace?sku=248154
we have one of those interfaces, Tony got it for working on his laptop at home. It sold for around $400 originally, it's down to $20 cheaper than the Lexicon presently.