Hello - I've been wanting to get a vintage Ampeg tube amp for a while and recently I've been focusing on the V4B as maybe the best of all worlds. (I've never tried one, but I have tried vintage SVTs and B-25s, as well as my own beloved B100R). If I go 70s, does early 70s v. late 70s matter tonewise? Also, for recording, is the original 2x15 cabinet a good choice, or would maybe a 410 be a better setup? Thanks in advance!