Hey, I've been reading this post and it sounds like you're suggesting wearing an undersuit under a compressed neo drysuit. Why? I thought the idea of compressed neo was to remove the need for an undersuit. I can see why you might want to wear some wicking thermals, but not the full-monty undersuit.
I've only used a membrane so far, and the only benefit I could see in swapping to compressed neo is that there's no need for the undersuit (oh, and they look cool too
)