Right now I have a 550 and a 33,000 gvw Kodiak. I know the 550(I think is limited to tow around 12,000 pound load) can't go more and the Kodiak would have no problem towing even a 75 and skid. I want to sell both and move up to something like the IH pictured for the 'little' truck and then get a tandem/baby tri dump.
The little truck would have to be able to move the excavator in for small day projects and do my small black dirt deliveries. I'm not so concerned about the go, more on the stop part. I also wonder if the Allison has a 'tow haul' like the super duty?
I'm in the hunt for a small truck for exactly the same reasons. I already own the tandem but need another truck for the smaller jobs. I can't believe how low the 550's tow rating is!? Are you sure you didn't get it mixed up with the max payload?