Scott, why wouldn't you do both?  If you have the expertise in the surface and the subterrainian, why not work them and work it all?  Supply and demand, as you well know.

P.S.  Come on down to the NALTEA conference in Clearwater in a couple of weeks.  You can lead a round table on the oil and gas business, and contribute something to the organization you helped start.  You don't even have to be a member to attend.