Before I get sidetracked into discussing old Sunns, let me cast my vote for the Sunn 300T/Bassman 300. Really quite monstrous amp. The fancy EQs aren't for everybody, and honestly I could do without it, just give me a mid knob, and the compression isn't really necessary, but I love the duel channels and Ch. 1/2 mix. I think they're really great amps.
Now, to JohnK and edbass, I know you guys have serious experience with the old Sunn 200s & 2000s. I've only heard recordings of them, never any actual real life experience, so I was wondering about some specifics about their tone. I know it's been called Hi-Fi, and they can get quite loud, but how is there mid-range? I use a Bassman 300 right now into 15"s, and I usually crank the mids and highs, and I use mostly a P-bass with roundwounds. I've been contemplating getting a 2000s to use to replace the 300, but I'm wondering if I can still get the growly mid-range with it. I'd love to hear your input, or maybe even some sound clips, since there are so few demos of these amps to be found. It'd be much appreciated.