Who cares how much oil they're sitting on? We have our own access now, and if they think they can sell oil at $30 a barrel while we're trading it at $25 they're idiots.
They can either be a part of the world energy market or they can starve. It's that simple. What's more, they know it.
As far as their arms go, they're no threat to us, and they'd have a tough time mustering enough pilots to be a threat to anyone else. I don't think they teach F-15 in Wahabbi school.
The US does have a vested interest in NOT having Arabia go like Iran did in 1979.I just wish the Saudis had the wisdom to recognize how perilous their situation is, entirely due to their own short sighted neglect.