There are loads. You shouldn't get a fuzzy picture with digital, it pretty much works or it doesn't. Although in a weak signal area you can get more pixelation and breakup.
Hauppauge cards are the benchmark. They aren't the best cards, but they are the most popular, so support is decent if not stellar. They are very well supported if you were to play around with non-MS media center apps, like MediaPortal or MythTV etc.
Here is Scans list of them:
http://www.scan.co.uk/Index.aspx?NT=1-0-33-277-0
I don't know what it is like, but the
KWORLD DVBT PC160-2T PCI dual DIGITAL TV Tuner and capture seems really good value. Despite being low cost, previous KWorld cards have had a good reputation.
I would strongly recomend getting a proper Microsoft MCE remote. Scan don't do them, but KustomPCs do (
http://www.kustompcs.co.uk/acatalog/info_5498.html). In my opinion there is no better MCE remote. Again it is so widely used that it is probably the best supported remote for other applications as well, even in Linux.
Hope this helps.