Based solely on tone/quality, which would you prefer and why? Secondarily, does your opinion change if the BD is about $120 more than the SRRI? (Assume both amps are ostensibly in excellent condition.) Lastly, were there SRRIs in the 90's? I thought those came later, but the cat I'm talking to says he got his in the 90's. I can't find definitive information on the Internet about that. Any insight on this would be cool. Thanks!