I have two ST Elite System version, one with steel BP and one with AL BP. They are excellent BCs, and there are no issues with them. You have to spend time adjusting the shoulder straps to fit your body, but it is a non-issue once adjusted properly with D-rings in a good place. I use a 35-lb wing on both. I added weight pockets to the plate under the wing, and I also have the Hollis weight pockets on the waist belt.
I looked at the L.T.S. Light Travel System, but as far as I know, it doesn't have a crotch strap, which I need since I regularly use a DPV when diving. I'd love to hear feedback from people who use it.