Now I can help you here. As Wade said the non laser ones are just as good as guessing. Bushnell makes several different models of range finders and they can get pretty pricey, but these are the best rangefinders IMO.
As far as GPS units SkyCaddy is one of the top ones, however there is a subscription required as well(I think it's around $10ish a month) and if it runs out on the course the device is unusable. We reviewed a device called the uPro recently
uPro review and it has gotten great reviews. You'll have to check the course guide at their website to see what is available course wise, but they have most of the larger markets covered and adding courses all the time. Basic course info is free and more detailed course views are around $10 a course, but there is no monthly fee.
With all that being said Dave, I am a 10 handicap and have found NO reason for a range finder. I don't think that I am good enough to worry whether I am a yard or two off from the marker in the fairway. Hell, if I was that good I wouldn't be a 10!! They are nice toys to have, but a little too much information for the average golfer IMO.