ride height looks good, but forget those wheels in gold, its just wrong mate, they look too much lik a subaru on a bad day..., nice wheels but in any other colour, graphite /black/silver etc but not gold.
just my input..
I like gold wheel's on blue Subaru's and can see why someone would put Helio's on a VW as they fit the bill of OEM plus, but for an Audi to have VW wheels especially in an unusual colour just seems crazy.
I had visions of it looking good... but tbh im not so sure.. the helios are nice.. but the gold is maybe not great.. did google searches of silver/gold combo and wasnt set but wanted to see what it could look like..
Black or graphite would suit yours as @A4Rob said. BBS, 3SDM or Rotiform are popular choices amongst aftermarket brands then people generally go for RS4, A5, A8 or black edition wheels for more of an OEM look. Black BBS CH in my opinion but looks are a very personal thing.
Can be very confusing looking at all the brands and finding the right ones for your specific car.
I think that Avant and cabrio coils are the same - saloon kits don't have to compensate for the rear weight. That's what I was told once anyway.
I had FK cheapo coils on for a few months before I fitted the Air suspension and tbh, they rode quite nice compared to the S-line suspension. With coilovers you have the option of deciding how low you can reasonably get away with too.