Cycler: If you go for a smaller truck, get one with the towing package. It will give you beefed up suspension and better cooling. Before you write off the idea of an F150 class truck, why not check some of the owners forums for the vehicles in question? I find they can be very good sources for honest performance information. I should also mention that I am currently pulling something similar to your rig with a 2008 F150 with a 5.4L v8 and towing package. I have had no issues with insufficient power or overheating.