I entered a series of contests to try to win a 935 during the Tour de France, but alas, 'twas not to be.
I do, however, really like my 735xt. Even though the chest strap never bothered me THAT much, ditching it for the Pod has been nice. I enjoy having the running dynamics feedback, because I like having data to look at and compare over time. (If I'm honest with myself, I know it's not as useful as I want it to be. But I still like it!) It connects quickly. The battery is a limitation as it may not hold through some ultras, and the 935 is supposed to give you a full 24 hours with GPS. (Also good for full Ironman, whereas you have to be fast as all-get-out for the 735 to last.)
One advantage for the 735, though, is the size and weight. I have really skinny wrists, so a lot of modern watches (GPS or otherwise) are ridiculous on me. The 735 is a little smaller, narrower, and lighter than the 935. So, while it's still big on me, it's not too bad, but barely there lightweight, which is nice.
Edit: One more thing... Having a triathlon watch is a nice option, even if you're not competing in those. At the beach or lake, you know your watch will be fine in the water. And if you want to throw in some cross training in the pool or the on the bike, you've got a great feature set. (I enjoy the occasional swim. I've yet to decide on triathlons as I remain tentative on the bike part.)