3 options imo. Each one has different mounting options that can be customized
Harris-. Can have cant and pan, but pan costs money. Quick deploy of legs but can only be deployed at one angle
Atlas- more independent adjustments of leg but take longer to deploy. Really high quality machining.
Magpul- new offering. Lower cost/simplier version of atlas. I held at nra and don’t think it has same build quality
I would say Harris if you know you want legs at one angle and want quick deploy. Some people tie them together with paracord to deploy both when moving one.
I would say atlas if you want more flexibility. You can angle legs at 4-5 different positions and adjustments are interdependent
I would say magpul if you are looking for a basic bipod that doesnt need super high build quality