Might as well keep your SC as to go with a quad cab. Not much improvement. The seat backs are very vertical. The CC or MegaCab would be a nice upgrade. Will give you enough room to justify the price. The Mega Cab adds a good bit of weight though which decreases payload substantially. I had a 5.9l 12 valve I just got rid of. It was a truck that I bought at 60K miles. I had to basically rebuild the chassis when I got it. The hub went out at 114K miles. The engine was great though. Truck just didn't quite match it. I took very good care of that truck and whoever has it now has a great truck. I spared no expense in building it. If it had been even a quad cab, I would have kept it. It was an older extended cab and the lack of access just got to be too much for the wife and child. I couldn't take two women whining at me.