When i was in the market for coilovers, i looked at bilsteins, kws, weitecs and ap.
Aps are ment to be more road orientated than weitecs and more comfortable. When i phoned up VWR and asked there advice on what suspension to get, they told me the V3s were good but couldnt really justify the price of them as they thought the Aps were the best option for a few track days and fast road use ! , in the end i didnt listen to them and ended up buying the Kws, mainly due to resale values, the inox body and the fact that better internals are used, Ive also had these on previous cars and was very happy with them.
My mate has the weitecs and the are very good, on par with the kws with only lesser grade components used.
So basically quality wise from research ive learned that the aps have different internals, very good on road, comfortable, and great for a few track days.
The weitecs are a halfway house, made in germany, pretty much the same as the KWS with cheaper materials and build costs. Like i said my mate has these and they are bloody good.
Kws, better internals / materials, good for track work and not too harsh on the road unless you live in potholeville.
Another option and is bilstein B12 shocks and springs, they are not coilovers and will lower the car 30mm, the damping on these and comfort levels are superb and are brilliant for track work, the only reason im not running them is i heard a few people having rubbing issues with going down 30mm and the fact that i go up a few dirt tracks so due to the fact i couldnt adjust the height up if required meant this was a No No for me. !
On VWRs advice id probably go for the Aps, lets face it they know what they are talking about, but saying that the weitecs are perhaps a bit better quality and they are very good.