Koni/Eibach tend to be praised very highly... AmD do them for about ?800 inc VAT, installation, 4 wheel "Beissparth" alignment, etc, etc.
I'm very keen to get them on my car, but I've got a Cabriolet on 205/40/17's already... it's really gonna shake all over the place then.
Spax kit wasn't a massive saving, unless you're doing it all yourself, other option was Koni/H&R, but the Koni/Eibach seems a lot more popular and cost less.
GolfVR6 normally swears by Weitec as being a nice alternative.
Not voted 'cos I'm still waiting to sort mine out and can't vouch for anything.