Just my two farthings worth -- my summer rig is a tandem-axle 24' Ragen toy box, hitch mount. Loaded with bikes and water it goes around 8K lbs. The stabilizing system works well for something of this weight.
I chose this over a 5th-wheel primarily to preserve the bed space - I have a hard cover on it. Tow rig is a 4wd '03 Duramax with Allison tranny that had plenty of power stock, more so now with the Banks. There might be a bigger 5th-wheel in the future if it comes to pass that I have more time to travel.
Hint -- buy now -- prices are right, especially lightly-used rigs.
