well hotbob, the idea is probably not too xpect too much for the massage itself. As many of the male massage parlours hire guys with very little or no xperience et al in giving good massage. However, you should tell them upfront if you are indeed want a massage instead of just cream application, sometimes they do have one or two guys that better in rubing your muscle the way you like it.
From my experience you should try SANCTUARY. It is run/owned by few guys who previously work @ the infamous Oriental Spa. I think the masage and service is just great and worth your baht! Its not far from Lumpini stadium. Small but Very clean and cozy interior.