I just use my henderson hyperstretch I got for diving...
2 pc, 3mm farmer john and a 7mm top. I hate being cold, so even on warm nights I tend to wear the top... always can be unzipped or just jump back in the water to cool off. I haven't needed to wear anything to cut the wind in it yet, the combined 10 mm on my core has worked in ~25 kn winds to keep me warm. Haven't had to do any massive hikes in it, though... probably would be hot as hell in the summer months.
No issues with ballooning/stretching, either. Only downside is that it's cut for diving, not surfing, so the range of motion in the shoulders is a little awkward... But that can be dealt with pretty easily, just takes a little getting used to. Hyperstretch is the way to go.
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