Dr Resai and Cleveland CLinic is the gold standard for DBS -STN's. There are a few other places that are as good, but none are better.
read up on the procedure, there is a lot of info about it.
Look at Johns Hopkins site and offcentertv's site (Ray Farkas) for info.
Charlie Black 56, DBS-STN in 2002 at UCLA
http://health.groups.yahoo.com/group/DBSsurgery/