Gunslinger!!!
Not real sure I've ever heard of that one. How about a link so we can look at it.
The Tree Lounge is one mighty comfortable stand, almost too much so. I missed a few deer while napping in mine. BTW a perfectly safe thing to do in the Tree Lounge. They are a bit bulky and heavy to carry but that doesn't seem a big issue for you. For me they were easy to set up and quick too. Climbing was no problem and they are maybe the safest of them. In my opinion not the best for shooting from but then some seem to think they are.
Summit is a first class stand and if it fits your needs you can't go wrong with them. I'd shy away from a "look alike" at that price. The one thing you need to ALWAYS keep foremost in your mind is SAFETY. Do you want to be hanging up there in that tree 20' or so up and have it come down real sudden like? Not recommended for long life and good health. So think safety first.
In that regard I'd avoid stuff from Warren and Sweat like the plague especially their Executive. I bought one and realized when I got it just how dangerous it is. I called them and told them to either replace it with a safer one or expect a class action lawsuit. They shipped a replacement right away and paid for it's return. Someone needs to sue them anyway just to get that hazard off the market.
I've long used and recommended Amacker brand stands, they are solid and safe. I like them. Loc-On was a good brand but they went out of business and while the name is again being used it's really NOT the same. I had a Loc-On Contender that used the Amacker Adjuster patten and it was a nice stand. I gave up going up trees and a member on here talked me into selling it to him. He and his son use them and wanted it for a back up for the day when one of theirs wore out.