Finally Got A Prelude

bought a 95 si, 5spd with 112k miles.

want to buy rims for it and was wondering if i should get 18 or 17.
i dont really want to spend another 500 bucks on a chamber kit so i was wondering if i get 17, would i still have to get one, i will probebly lower the car just a little.

also the car has 112k miles on it, is that too much for engine mods, becuase i dont want to buy all these engine mods and then the engine takes a crap on me.

thanks