With the same mods at same power level, of course the 530's are going to look more desirable, but who the hell buys gt28rs' if they only want to make 450 rwhp. 300 rwhp @ 4k rpms with 600+ rwhp capability hardly sounds like its 'useless unless your goal is to have your car become a dragster'. But fine, go ahead and spend 3 grand on turbos with mediocre performance, not my decision.