I'm using an AverTV-Phone by Avermedia (www.avermedia.com) with kernel 2.2.13, the bttv driver, and xawtv. It works very well. I, too, have not yet used the IR remote under linux, but I think I've seen somewhere that it is supported or will be shortly. It's also a pretty good video capture card. This card is also a stereo tuner, but I haven't tried yet to use that under linux.
I bought this a long time ago, and then it cost around $75. The newer version is called TV98 and runs for about $65 (maybe less if you do some leg-work). I'm pretty sure it is also supported by the bttv module. Your system specs are certainly enough to run one of these cards. Brian J. Stults Doctoral Candidate Department of Sociology University at Albany - SUNY Phone: (518) 442-4652 Fax: (518) 442-4936 Web: www.albany.edu/~bs7452