35 should be flush..... Or so I assume lol
For your MK6, I'd go with the 45's. ET 35 will have you sitting around where Devin's Rotiforms are right outside the fender and unless you are running a super stretched tire and rolled/pulled fenders it might get ugly. Really all depends on the ride height as well.
Damn, never would have thought something 8.5 with that high of an offset would poke on a newer vw. I would automatically go with the higher offset choice unless the offset affects the look of the wheel a lot. With the higher offset option you can always space it out.