I like the dump pouch too. Lots of wide war belts with the lumbar support. I just found a regular thin style in my pile of stuff, coulda' sworn I had their piggyback pistol+rifle mag pouches but no just singles. Stuck a cheapie drop leg on it to try. So much gear I tell you.
I actually prefer the lighter USGG Contractor belt setup that I have, but I don't like the holster that I have for that one that can accommodate my Glock 17 with X300. The holster I have for that one is a drop leg holster and I don't like the strap on my thigh. I could use the drop attachment for the USGG belt, but it rotates some with I use the Safariland holster. The USGG Contractor's belt works fine if I don't have to use the holster that fits the X300.
The good thing about the HSGI belt is that you can throw it over clothing. The USGG Contractor's belt goes directly on your waist. I've taken a few classes in Alaska and the HSGI was perfect to fit over layers of warmer clothing and rain gear.
As dirtylickins and I were discussing the last range day, that's what the range days are for. To try different set ups and to see what others have and ask them the pros and cons. Some set ups look like they would work well and only to find out that the don't work quite that well once you start shooting, moving, transitioning, etc.