I bought a size S Xcel Infiniti 5/4/3 X-zip 2 (man the wetsuit names are starting to sound like lab equipment model #s) and the body fits perfect but the hood is mildly too tight, compressing my neck from the top down.
I talked to a salesman from the place I bought it and he said on his O'neill suit the hood did stretch considerably (he said it was hard to breathe the first time he put it on!) but he didn't seem to know if it'd stretch out in the up-down direction or not.
I haven't worn it in the water because I want to be able to return it if need be, but has anyone had experience with any of the Xcel hooded suits?