Squeak, take steps to make sure your concrete block wall is waterproof..Coat it with Thermoseal or another top grade coat..even if it appears dry..
You do not want moisture to accumulate behind a closed/finished wall.

BTW, Dan, don't forget to wire your studio walls while you can,,maybe two separate circuits...one for lights and stuff, the other for isolated recording gear..

[This message has been edited by Fran Carango (edited 11-10-2005).]