I have a C-740 that I love. If you'd like, check out :
http://croww.blubox.yi.org/pics - Finished Pictures directory. Its a hobby, and I'm still learning alot, but those are a few pics I've taken since I got it in the summer.
I'd definately enjoy having a C-750..seems like my 740 is great and the 750 is just more robust, probably a great purchase!
You can go here and check out sample pictures from all of those cameras and see which ones you like the best. Pick the manufacturer and then the model, then hit refresh to see new pics.