Need help with offset

[wam22]

I need to purchase a second set of rims for my B9 S5 for winter and the offset on the OEM wheels are ET32 (19x8.5 and 5x122). I am looking at hartmann wheels and for the 19x8.5, the offsets available are 25, 38, and 47. Any suggestion on which size to get and if I should put spacers on or if I will be ok. I would have an Audi tech put them on to make sure they fit correctly too.

[Skyler@Achtuning]

The ET25 offset should be fine for winter use, this has been a common fitment on the B8 and the B9 is very close as far as fitments go. There would still be room for spacers if you wish though for winter many leave the wheels inset a bit.
Thanks!