Both those camcorders are now getting a bit old. They're basically the same internally anyway. I would suggest the PD150 or 170 in your case and use the money you save to get a decent tripod and microphone.

But... It's far more to do with your skill than your equipment. Join the IOV (Institute Of Videographers), find a wedding videgrapher and work as an assistant for a few jobs before splashing out on gear. Learn from his/her mistakes before making your own!