If i was voting, it would be Obama.
The election choice is a bit of a choice between the lesser of two evils, but in an almost complete reversal, the democrats appear to be the party of fiscal responsibility this time around, and the rebuplicans have lurched further towards the authoritarian side of the scale on more issues than the Democrats have (although Obama's stance on the 2nd Amendment is still distinctly illiberal).
I can't believe how far McCain has shifted from his 2000 stance, where if he'd won the primary, he'd have been a complete shoe-in for the role.