hmmmm pretty much polar opposites...having been in my bro's 03 gt and driven it...i became convinced that i had to have a mustang gt...however after being in it for an extended trip with him last weekend i can say now that of your two choices, from a comfort standpoint, i'd take the lexus
however, as a red-blooded american, nothing beats the stang...and i've found out that the new ones, anyway, have a dmd...granted it is a really big one compared to the 2.5 duratec's
hell take the gt and the brute strength...no, wait..go with the lexus...damn im no help