I've attempted 24/96 from the UA-5 over USB to about 4 different laptops. The only one that I had complete stability on was an HP Omnibook 500. Which was a slick little notebook and probably sells cheap these days on eBay. I'd buy one again in a heartbeat. I had no problems running XP and very little "fine tuning".
Viao...forgetaboutit
IBM....I could do 24/48 on an realy old model I was using (560, I think). It was a PII, 266mHz w/ 160mb RAM. It worked fine for 24/44.1 but I had some trouble with it at first, took a lot of tweaking.
Oder Dell Latitdue...same deal. Lots of tweaking, not very reliable.
Bring on the FA-101 !!