It all depends on what kind of tuner you feel like at the moment. You could feel like, "Yeah....I got Volks.....so, uh, you wanna get off my nuts?!" Or you could be like, "Your car looks nice in my rear view mirror!"
Both work just fine. Either way, you're eventually getting both. You could pick up the exhaust and invest the difference so when it's time to get the wheels, you've got gobs of cash again.