The new Road Angel (Road Angel 2) is an all-in-one GPS and laser detector. Not sure where you'd mount it on a bike to get the best laser detection though. You'd also need to hardwire it into the bike, as you would with all of these systems.
I have a Road Angel 'classic' for the car(s) and it's superb. Very clear LCD screen that flashes red when it alerts you. A mate has a Road Angel 2 that he's very happy with also.
Check out
http:\\www.ukspeedtraps.co.uk for comparisons and tests of what's available.