Winter wheels and tires
 

Will a 20x9 w/275 rear and 20x8 w/245 front fit ok for a winter wheel and tire combination?

just do 20x9 with 275 on all 4 corners unless it is way cheaper for the 245 for the front. most snow tires are so soft it would nice to be able to rotate them. even if you go all-session tires i would do 275 for all 4 for what you are looking at for a winter setup. keep in mind this is just my opinion.