No upgrade for me. My Mk V is 2 1/2 years old, just touching 15k miles and still looks/drives great.
The Mk VI IMHO is very slab sided and looks fat and heavy. No doubt it does drive well and is an improvement in dynamics, history has shown that VW do not make significant advances in model variants. Given the market and the self serving motor industry, I'd rather burn my car than accept any dealer/trader part-ex valuation, so I'm keeping it

That said, if I did have a few quid lying about, I'd probably go back to a Porker and get a nice 993 but the missus would like a camper

I ain't that old yet
Cass