I have the Bushnell Hybrid. It combines both. To use it I put together a arm with a quick release.. much like a camera tripod. I attached it to the frame of the golf cart windshield. The window of the GPS facing me.
This way I am not away reaching for the range finder, and when on the fairway where distance is all I can hit I still like to know the distance to the green. My best approach shot is 100/60 range.. so if the green is 250 covered with bunkers and a small landing area I may hit an 8 iron apporach... then wedge it the rest of the way. It has been a storke saver for me.
When I go for the pin I use the laser by relasing the range finder from the thumb quick release. It goes faster and a helps pace of play.
If you have not tried the Bushnell Hybrid I would recommend it, but also rig a arm with a quick release.