Some more food for thought. If you have not gotten your ATP yet, the type rating will give you an ATP as well with little extra training required. You just need to show up with the ATP written. Kill 2 birds with one stone and cover all of your bases.
I realize that you are talking C-130 type ratings, but if you pony-up for the 737 type and are a fighter guy, you get some exposure to the simulator and the crew coordination. Good stuff if you interview with an airline that also requires a simulator evaluation...