Well, I have the cash to buy any of them, but would prefer to spend as little as possible (obviously :P )
I actually found a 2x12 Orange cab locally for $380, I REALLY hope he still has this, he's about a 2 hour drive away, but for that price I'd be willing to drive up there, plus it's nice and cool up there... no 110* weather, could make a day out of it and just go chill up there for a while.
I found a guy that might be interested in trading me his 5150 III for my Mark IV as well, so I might just be getting a whole new rig!