Why not compromise and buy a pre-gen for cheap for now? You won't get as much debt, he might not be as against it if you explain it will help save money in the long run, you still get a great bike, you can always modify the pre-gen as well, and later down the road you can get a newer one.
You don't HAVE to buy new. I know people love the looks and upgrades they did to the new-gen, but sometimes you gotta draw a line and be a bit more reasonable.
It's just a suggestion that might work out better for all in the end.
(pssst - SUNNY: help me out, you and I seem to be the biggest pushers of the pre-gen model
)