leedsquietman wrote:If you don't need much I/O the Audio Kontrol 1 is a great interface.
The Fast Track PRO is a much improved unit on the basic Fasttrack.
The Edirol UA-25EX is not a bad unit either.
USB2 is going to be the way to go. USB interfaces sucked for a long time, but this was partially because not many USB interfaces existed and most of those that did only ran USB 1.1 so longer latencies and much less bandwidth was available.
Firewire interfaces are going to be phased out within a couple of years, Apple dropped FW support on the Macbook and tellingly, Apogee just release their first USB 2.0 interface for Mac, and RME's Fireface UC is supposed to be the dogs nuts of USB 2 interfaces, boasting super low latencies (as low as 14 samples on Mac OSX) - although it will be over 1200 dollars. Firewire still offers more I/O but getting good combinations of drivers and FW chipsets can be a headache.
also, if u hav windows, definitely check what users say about any problems. i have a motu 828mkII usb - all reviews of this will say it is/was one of the best soundcards in its category. however, they fail to mention the problems windows users have. for me, if i have my wireless card on i get guaranteed audio dropouts, crashing and hissing. given i use this as my primary soundcard, it makes listening to songs on youtube, etc pretty difficult. if i had known motu had such a bad reputation on windows i would not have bought it.
if u go for firewire on a pc laptop make sure u hav a ti chipset, otherwise definitely get a usb soundcard.