want to bet with a friend on the pac/mosley match

so i'm not a hardcore sports bettor, but a friend and I have taken to betting opposite teams on nba games (with the spreads).  anways, we both want to bet on the boxing match coming up, but obviously we both think pacman will win.

is there anything else we could bet on that would be fair?  for example, what round the fight will stop?  if i picked decision at even money, and he picked 8th round at even money, and anything else is a push, would that be fair?

also, any other suggestions?  we dont want it complicated with odds..that's why we always went with the spreads in nba.

thnaks!

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