Hauppuage 2250 is the prefered HD Tuner today...That what i have on my system with (2x 4890) on 70inch HDTV. I got it from newegg.http://www.hauppauge.com/site/products/data_hvr2250.html
Hardware and Software works well with Vista-64 and Media Center. This is the card that got me the best results...
hauppuage 2250: Hardware and Software works well. HD Recording is excellent.
ATI 650/600: A lot of software issues and don't work with Windows Media Center
hauppage 1800/1600: Analog TV Reproduction is a degraded version in comparison to std TV
Pinncacle HDTV pcie: Hardware is great but it has software issues with very slow support