I wear the Henderson 7/5 Gold Core when I dive the caverns and springs in Central Florida; keeps me warm and almost dry all day. I have not tried other brands, but I really love it.
I'm a bit confused... I didn't know that Henderson made a hyperstretch gold core...
At any rate we are CA divers and wear the 7/5 Gold Core. We also wear a full hooded vest underneath.
My vest is also a gold core and my wife's vest is a Hyperstretch
We find this to be just barely tolerable some days here in CA. The Yukon and Point Loma are too cold for this IMHO. The Coranados are quite nice with this rig.
We did spring for the gold core boots and they were a definite upgrade from our original ones.
The Gold Core lining dries pretty quickly but can be tough to get on if you sweat at all. Particularly the calves and arms. I've torn my right sleeve twice.
The wife liked her hyperstretch vest so much that all her warm water suits are hyperstretch.
Mind you that she wears a 3mm with a 5/3 hyperstretch hooded vest in warm water.
I'm happy in a 2mm or just my vest in the warmer climes and even I find the CA water too cold.
Good luck in your quest... I definitely recommend a full overjacket for surface intervals.