I am also considering wider tires and bigger wheels. I have done a lot of research on what actual sizes (i.e. wheel/tire combo) will closely match the stock wheel/tire combo on my LE (265/70/R18).
305/55/R20 with Nitto Terragrappler will be great and is faster than stock by about 3mph - Current stock speedometer will read higher. - It will be about 0.6 inches taller than stock
305/45/R22 - will be about 1mph faster than stock and 0.2 inches taller
285/65/R18 with BFG AT will be about 0.07 mph slower and just about the same height
325/65/R18 is prety good as well - about 7mph faster and 2inches taller (might need 2.5" lifts on a RWD)
Check out
http://www.titantalk.com/showthread....3&page=1&pp=15
There are several tire size calculators out there and also wheel matching
Check out the sites below
Cheers
http://www.bigwheels.net/index.jsp
http://pw1.netcom.com/~sgalaba/tiresize.htm