Reading through some of the posts here, but not all, I can only add a summarised opinion really.
For me, AP are the best bang for buck brakes out there, full stop. I went round the Ring in a 500+ bhp BMW 335i modded by a guy who is SO, SO serious about mods that he was actually used by BMW to test their own 'Performance' brake upgrade on the Ring (he destroyed them, cracking in a piston on the first day.) He has AP's on his car and they worked perfectly on lap after hot lap at the Ring. Why pay more, for less?
I can't comment on VWR, so no idea what their product is, but I can't see how it could be much better (if at all) and unless it's cheaper, it would be a no brainer for me.
In respect of my own Stage 2+ car I have R32 brakes that cost me 300 bells. They stop the car easily and don't cook or fade on fast road driving so that's good enough. They are bloody heavy though and I expect the Ring would see them fading in less than a couple of laps. If I tracked more than once or twice a blue moon, I'd have AP's.
Matt