Sony SVR 3000 - DVR - TiVo - 80 hour(s)
The absolute best Tivo available.
I just wanted to mention one other reason why this is the best.  This is the only 80 hr Series 2 Tivo that is designed to work with two hard-drives.  This one therefore is easily upgradeable.  Other Series 2 Tivos lack the appropriate power supply and brackets to support an additional hard drive.