light wheels for a "heavy" car

[sultan]

4300lb curb weight and i'm looking at enkei nt03+m or maybe rpf1 since they're cheap (except when they're used, people always ask for more than they actually cost new for some reason). tire will be 30.5" or 31" tall. vehicle will also occasionally tow a 1200lb-ish trailer. 18x9.5 +27 nt03+m with 275/60-18 is what i'm leaning towards.

on the chrysler lx forum a guy was using rpf1's on his wagon with r-compounds for road racing without a problem so i assume the wheels would work without exploding on a mostly street driven vehicle (no offroad, but maybe gravel). nt03+m is supposed to be stronger than rpf1.

centerline has actual specs on their site as to load rating and max tire height for each wheel which is why i'm kinda concerned since nobody has this info or their site. i could get forged centerlines for a similar price to the cast enkeis but they're a little heavier and uglier and may not have the brake clearance.

te37 is what i really want but can't afford new and nobody has a non-stagger used set for sale in a proper size.

[nando]

what kind of car are you planning on installing these on?