Which used car to get, (mod 900xp vs OEM 1000xp)

Hey I figured some of you here may have upgraded from a modded 900xp and could give an honest opinion.

For $15-17k I seem to be able to get a fully modded 900xp (30" tires, arms, king shocks, seats, doors, pipe)

Or a stock 1000xp.

Which is gonna give me more bang/fun for the buck? Keeping in mind a broken machine is no fun lol

I ride the mucky north woods of MN.

P.S. I seem to be able to pick up a stock 900xp for $9-10k, is that plus 30" tires, axles, clutch and minor engine mods gonna be 90% as good as a 1000?