Just found the board and it looks to be a wealth of information. I just bought a 74 cb750 last friday (craigslist) and bought 2 more yesterday..a 75 and 78 cb750 (Jack's Cycle in Sanford, FL). I just started riding again after a 12 year layoff...but I would say I'm in full swing again. I decided to go with the cb750 after seeing the cb750cafe.com and benjiescaferacer.com websites...amazing stuff.
What got me back into riding was looking at some of the Japanese websites and what they did with a sportster...(nicemc.com and bratstyle.com) I bought an 08 xl1200n 6 months ago...but I have to say, I'm more excited about the 750's.