I am no expert by a long way. I too have a pair of heavy OEM wheels on my road bike, and I'm currently trying to convince myself that the wear indicator is still deep enough to do another summer...
Anyway, from extensive research on forums, the usual suspects are
PlanetX model B - currently £99, loads of people think they're great (but I suspect that most of them are heeeavy bifters without much experience)
Shimano Ultegra 6700 - good offers on these at the moment (chainreaction, merlin cycles and "Absolute Bikes" on ebay), I quite like the look of them as they have a steel freehub body so will take an older 8 or 9 speed cassette no probs, are quite light and I'm tempted to try out Tubeless...
Shimano RS80 - cheaper version of dura-ace 7850 C24s, all-round carbon clinchers, light and some people think they're great (I suspect that these people are a bit more knowledgeable than the MobelB fans)
Fulcrum 5s or 3s - look good, good reputation, noisy freewheel.
Mavic Ksyriums - archetypal factory wheels, lots of strong love/hate opinions around.
Other options are handbuilts - this is a whole world I know nothing about, but I've seen good things said about
http://www.wheelsmith.co.uk/ and
http://www.roadacecomponents.co.uk/.
Oh, and I'm intrigued by the Hed C2 clinchers (Ardennes, Kermesse, etc). They seem a reasonable price for the weight and claim to have a significant aero advantage over narrower rim clinchers.
I wouldn't do too much research on the internet - you can always find someone who's had a bad experience / thinks that a certain product is crap. Oh and apparently all the manufacturers lie about weight.
Just buy something that matches the colour of your bike and you'll be fine.