Thanks! I had the same dilema, sort of... I wasn't even considering the OEM RS4's with ET29 at first, but more research I did into different wheels, options etc., more I got convinced that if I'm to spend that sort of money on new wheels, it better be worth it. My old ones were 17" with (almost) new PIRELLI tyres and I already liked the looks very much, so I didn't feel like going with 18" would make a whole lot of difference and justify the price of getting new rims & tyres if you see what I mean. Also the price difference between 18" and 19" was relatively small anyway. I must say that I really like the look of my new 19's on the cabby, and I absolutely love the RS4 wheels!!!! (I haven't been able to find replicas that I would feel good about spending £500+ on). But I definitely need to get a set of coilovers as it just doens't look right unless it's lowered (at least it doesn't with ET29)... So unless you are prepared the spend more $$$ on your suspension (and potentionaly other things that prove neccesary once the car is dropped.. eg. rolling fenders, removing well liner, adjusting camber or god knows what else..), then just stick with some larger offset and avoid OEM RS4 wheels. ET35 should be just right without need for spacers. In terms of size if you already have 17's, I would just go with 19's if you are after RS4 style (either reps or A6 LeMans) as I think they look much better in this size...