I had a first generation 5150, as well, and loved it. Though when I down-sized it was the 5150 that got sold (while I kept the JCM 800). But, that was primarily

I had a first generation 5150, as well, and loved it. Though when I down-sized it was the 5150 that got sold (while I kept the JCM 800). But, that was primarily a function of the size of the 5150 + 4x12" cabinet, while the JCM 800 was a 2x12" combo (which is clearly the ideal amp size for performance, though too big for recording); both amps were excellent. I consider it one of Peavey's crowning achievements, maybe the best thing they ever made. I haven't heard any of the new generation of them, once they stopped calling them 5150. They also moved most of their manufacturing out of the United States a few years back, which reportedly impacted quality...I don't know if the tube amps are still made in the US, or not. Since I moved out of the motorhome (the reason I sold my JCM 800 and downsized to a tiny Vox was because I was living in ~200 square feet for four years, while traveling full-time), I've since bought another Marshall. It's a 50W JCM 2000 (I think...maybe 900) that I picked up for $600 (and a 4x12 cab that was a few hundred more), but it rarely gets used. The Vox sounds great and is right-sized for indoor use. I'm really happy with my Vox, honestly; for most things it sounds as good as any amp I've ever owned, and I've owned some good as hell amps (I've also had some old Fenders). I wish it had a bigger speaker; a 10" would make it the perfect amp. It's got an 8", and sometimes low end stuff sounds pinched.