chrome always looks nicer than silver and is a little easier to take care of, but you are paying for the extra luxury of it.
im not going to suggest anything to you. both will fit and both will probably be just fine without rubbing. if it were me, i would get the +35mm offset. if you want to play it safe and make sure you dont have to roll your fenders or anything then get the +45mm. i already have my fenders rolled from when i was running my 19s. i could probably go down to nearly a +20mm offset without serious rubbing issues.
