Terratec is ok now I guess, they had a bad rep concerning their driver support some years ago (EWS64XL).
I hear good things about Hoontech too, but Midiman has the best support of those three IMO.
They even had 2nd generation final drivers for Windows XP (which are really good and stable) when the others still only had beta drivers.
RME probably makes the best and most powerful cards out there but they're probably way over your/our budget.
www.rme-audio.com