I know what you mean about "cool factor", but believe me, it wears off, while the practical aspects, like better fuel economy, comfort of ride and tighter turns (especially at a boat ramp) never do. And besides, try it for a while with the third axle and decide yourself. These 5 tons are going cheap, so if you make a change, it's not like a mega $$$$ mistake. With the springs of a cargo, your already way too heavy duty and it comes with a bed. It's just my personal opinion, but I'd buy a cargo unless I had a use for the fifth wheel since shortening is always a possibility, but lengthening a tractor is major and bobbing just gets you back to essentially the same as a cargo. There really is not much difference but tractors seem to sell for a bit more money. I'd be looking at Lansing.