Went with the Bushnell Neo iON. It's a little bulkier than my Garmin S1, but it'll be fine. The longer battery life is nice, but I always recharge after the round anyway. Not crazy with the USB recharge cord because I never recharge thru my computer, so I'll just use an AC/USB adapter so I can plug into a wall outlet. It's also waterproof opposed to water resistant.
It has a few options the Garmin S1 doesn't have like up to four hazard distances per hole. It has a pedometer and odometer if I'm ever curious about how much I actually walk mileage wise. Suppose to rain today here in Florida, so I'll hopefully try it out later this week.