From personal experience, i think the Summit stands are hard to beat. They also have excellent customer service if you need to order any accessories or if you have a problem with a stand. I once thought i had a crack in a weld on one of my stands and called to see if i could ship it back for inspection. Summit sent me a new bottom for my stand and a return label to send the stand back while shipping company was standing there. I honestly couldn't tell if it was a crack in the weld or just a paint crack, they said not to use it a shipped me a new one, no questions asked. It don't get much better than that.
Also the stands are comfortable enough for me to sit all day. I have the Viper model. I haven't tried the new fold down models yet. Very quiet and easy to get on and off the tree.