I use an '08 Kodiak 4500 2WD as my tow rig. I have a 12' landscaping/dump bed on it that weighs over 3k empty and the off-road rear tire package. Our ramps here are pretty heavily textured, so I haven't had any problem.
I have read about people having trouble with medium duty 2wd rigs on slimy, smooth ramps.
If you did get one, definitely get the nobby rear tires, and if you are building a custom bed, either build it as heavy as you know how, or install a bunch of steel ballast weight or something.
I also use a drawbar extender (a heavy duty one) when I am launching. Not only does it give an extra foot before the rear tires get wet, but it gives the tongue weight a little more leverage to load the rear tires. These rigs do have a locking rear diff, so that's some help.
I guess if you are trying to score style/bling points with some Miami crowd, showing up in a basically commercial truck isn't the way to go, but I could care less what anyone else thinks...
P.S. I also use this truck for general hauling/moving and getting lumber, concrete, etc, and once you have one you'll never know how you got along without it. It can swallow 12' lumber at the home depot, haul storage sheds-in-a-box, etc. I welded ratchet tie-downs all the way around the outside, and have a heavy-duty truck tarp over the top. Really useful truck, because I can pull the tarp and load tall stuff too. I can haul 5k in the bed before I even start to notice there is anything there.
Note that the 4500's come with either the Dana 110 rear axle (for 16,000 GVW) or a Dana 130 (for 17,500 GVW). The 130 is actually the standard axle on the 5500. The 4500's ordered to be dumpers usually get the heavier Dana 130, and mine has the Duramax/Allison, and 4.56:1 rear end. Why they have to go and confuse things and not just make all Dana 110 trucks 4500's and all 130 trucks 5500's I'lll never know. I think the 4500's all have a 7K front axle, and the 5500's have an 8K front.