I was tempted by the Superstars but was also put off a bit by some of the poor reports of build quality. People who've got a decent set do seem to really rate them though.
Found a great deal on the Fulcrums from a company in Germany, so ended up going for them.
Early days but really pleased with them so far - not featherweight but not porkers either. Have been hammered over Dartmoor granite a few times now and are still running straight and smooth. Build seems really good. Graphics are a bit "in your face" but I quite like the way they look on my de-decalled KM.
This is the company I bought off - arrived within a couple of days so can't fault the service either. They're showing as out of stock but a couple of other companies in the UK are now doing them at a similar price - Rutland Cycling included.