Andrew,
I've got both the Jigging Master and the 7 Seas belts.... I tend to use the Jigging Master more for jigging, and the 7 Seas for popping and light jigging as it sits higher up on the thighs...
The JM belt hangs much lower, but is pretty adjustable with the straps etc so have it sitting higher if you need to, depending on your hieght, rod, and fighting style, suits some, doesn't suit others... belts tend to be pretty personal choices as to what fits... ....
If you plan to go with more popping, I would recommend the 7 Seas or Tuna/GT Max belts, or the Fisherman Flat Harness....
On the other End, the Braid range are light, and cheap ( comparatively ) and they run the whole gamut from super simple to monster... the Sailfish is a pretty good cheaper alternative popping belt...