The weather is breaking for the better over the weekend so I'm gonna go with the 3 season yeti... Friday night is hitting around 38* but Sat night is looking more like 43*.... being a cold sleeper I add 10-15* to the low rating to be comfortable and that guess has worked out well for me. I'm pushing it Friday night (yeti rated to 30*) but I can deal.

That frees up a lot of space in my pack not to mention weight.