ok im looking at new wheels for my xfi and i found some i like i want to run a 20x10 with a 275-35or30 -20 rear offset is 42, and a 19x8 with a 225-35-19 the front offset i can get a 45 or a 32 which would work better? will they fit? and whats the common tire sizes when going with bigger wheels i want some tire to protect my wheels but i dont want it to look dumb, also i would like to lower it in the future if that makes any difference in my choices. thanks everyone!

http://www.tsw.com/alloy_wheels_nogaro.php