Well i ordered my new BFG G-Force T/A KDW 2's.
Should be on this week some time!!!
and thank god cause im tired of having to put air in these factory POS's everyday lol
That's a tough one and I'm certainly no expert (Both sizes would be an improvement over stock though) However, my personal opinion would be to find a set that are 225/40/18 that fit a 7inch wheel within mgr specs. The tires I have listed in my sig for example will fit our stock rim as they're within specs. Tire rack is a great source of information - Just go to their website and do some browsing..
thanks for the info man.....was looking around on here but could not find too much about anyone switching to th 215/40.....most of what I found was for the 225/45 switch.....but I will check out tirerack....