19x8 wheels backspacing (tried search)

im sure you guys get tired of answering wheel questions but ive already searched the archives for hours. I have an 04 A4 quattro with tein coilovers and sway bars. ive read eveyones concern about 19's rubbing but i know so many of you have 19s and that is what my heart is set on. the car is low but not extreme by any means. could you tell me what the best back spacing is for 19x8 and 19x8.5? i was thinking more about the 19x8 to sneak away from rubbing. is a 32 backspace ok? or is 35 the best? please reply if you have 19s. thanks

ttt

I run 19X8's at et34. The offset is originaly et42, but I use 8mm spacers for street wheels to clear my big brakes.
Much lower than et34 would rub on my car with 245/35/19 tires.
Remember, lower number offset = wider stance. For example, the stock RS4 wheels are et28.