A4 143 sline project

Hi there all, new to the forum so after some tuning and styling advice from the pro's

If had my 08 A4 143 for just under a year now and have decided to do a few styling mods to enhance the car. My brother in law has an a4 which he purchased fro autovouge in birmingham which makes my car looks pants lol. Ive remapped the car and tinted the windows so far but that's about it. Ideally I'm after the below mods but am struggling to either find the best product or the product in the uk. Any advice and guidance would be greatly appreciated. So I'm looking at doing the following

Upgrade the 18"s to either 19" or 20"'s? Anything I need to look out for with this?
coilovers - seen some on eBay for approx £490. Is this too cheap?
Quad exhausts - anyone know where I can get these from? In uk?
Full Reiger kit
or maybe the RS4 grille? Is this an easy change?

Thanks people.

Thanks guys!

That's a beautiful example mate. Very nice indeed.Mine is already the s line model, but want to move on to the quad exhausts like the 3.0 tdi. where did you source the boot spolier from? lovely.

I'm under the same impression with the bodykit after thinking about it. Do you know anyone who could give me a price on the quads?

Cheers guys