Depends how you drive I suppose. Someone once said you lose a couple seconds 0-60 but I don't drive like that so it doesn't matter. It takes more power though I suppose. I will know more when I need to merge fast or something. As for rubbing, I did the pinch weld mod and trimmed the bottom of the fender flare and now I'm good. Not sure about stuffing them though. That takes more work I think. I don't stuff so it doesn't matter.
I'd be curious to hear what you think of them after you've had em a while and take em offroad