Audi A4 S-line Alloy Wheel Options..

First of all I sincerely apologise as I am sure you are all sick to death of this sort of query!

I have been BMW for the last 8 years and have finally made the big switch to Audi.. Treated myself to a very nice spec black 2009 A4 S-line 2.0 tdi automatic.. (As seen in the attached image).. Lovely car inside and out.

I am toying with the idea of changing the alloy wheels to a 19" something or other, with the RS4s really catching my eye (example image of white car attached)..

Anyone have any recommendations for me to take a look at? As always images would be appreciated..

Need as much help as possible from experienced Audi enthusiasts

Cheers guys.

Also the RS6s are really starting to catch my eye too.

Any help is much appreciated.