Lock-ons: both Rivers Edge and Gorilla have a lock-on that has an adjustable floating seat, that are very comfortable. The Rivers Edge is going to be heavier, but probably less expensive. Ol'Man also makes a very comfortable lock-on, that has a mesh seat. On private ground, where you can leave a stand up, go with the lock-on and climbing stick. Use climbing sticks with opposing steps (dual steps). This makes it easier to stand on the stick, while doing the work you need to hang a stand.
As far as climbers go, all the brands out there these days are relatively good and light weight. I personally use an API Grand Slam.