I'm leaning towards a Summit Open Shot. I've used my son's OS couple of times, seems like a good stand.
Gonna use it tomorrow so I can compare it to my nephew's Viper.

The Viper is definitely comfortable but hunting where I hunt I'd like to go as light as I can.
I stand a lot anyway, even when I'm hunting on the ground.
I bought my son an XOP hand climber last year, thought he would like it but he doesn't care for it, the seat don't flip up and he says it's hard to climb with.