I'm sure this subject has come up many times but here goes I'm getting a drysuit (need to extend my Great Lakes dive season), decided on Bare XCS2 Tech Dry. I've looked at the various underwear options and it seems the purpose built mid-layers are worthwhile but as for the base layers is the there a major advantage to the Bare (or any of the other purpose built options) or should I just get high quality underwear? Seems even the premium ski underwear is about half the price