I'd go bike 2, no one needs a shamed bike! I actually bid on a couple of Jimmy Savile's old bikes, I'm really pleased I didn't win one now
Don't tell me he was doping too!!!
Regarding the bike choice, personally I'm slightly superstitious about these kind of things since being in a similar situation to you. I bought a frame, also previously owned by a pro rider of questionable moral standards. Subsequently it got stolen from me.
On another occasion I bought a frame off ebay which when it arrived showed all the signs of having been nicked and (badly) stripped down for parts etc. (It didn't show up on the stolen bike database for the record) On the 3rd or 4th time I rode it I got knocked off by a cab driver in a hit and run, broke my leg, spent a week in hospital and as a result had to postpone my wedding, which my wife still reminds me of whenever I'm in the dog house
My advice, if there's any doubt in your mind about the dodgy one then don't bother as you'll never truly enjoy it.