Believe it or not, a magazine tested like 20 different wheels from the cheapo aksiums to $4000 wheels and the aksiums actually tested better than mavic's most expensive ksyrium wheel, the ES's.

I'm your weight and I currently commute on a pair of the same specialized at400 wheels on my fixed gear. I suppose the fixed gear and NYC can put considerably more stress on it than your roads across the pond but mine have about 2 weeks use on it and they're relatively true. The front wheel has about a 0.08"-0.1" hop after slamming into a few big potholes. I'm waiting another 2 weeks or so of continuous pounding to get all the problem spots to reveal themselves then I'm gonna have the shop retrue/tension it. I did that with a pair of mavic cosmos road wheels on my road bike and it's taken at least 5 hits that I know of into almost foot deep potholes at 25-30mph w/o going out of true at all.