I have a bunch of amps and speaker cabs at my disposal, but you know what gets most of my practice time? An old 1981(?) Ampeg G-18 transistor 'practice' amp. This thing has killer tone - good enough for recording. And I got it for $60 on eBay. Don't just take my word for it, check out this review on Harmony Central. Click Here

BTW: I also have a VT-22 and a VT-40. But I'm not about to part with my lil' G-18! :D