Only the Index might be better due to being able to run at a faster refresh rate, but you need monster hardware to do it, plus the motion smoothing on Steam VR is nowhere near as good as the Oculus version if you can't maintain that framerate.
Some people never get over motion sickness, though you can mitigate it by avoiding titles with smooth turning or smooth locomotion. Roomscale games where you walk around or teleport tend to work best.
How have you tried to get used to the motion sickness? The best way is to play until you start to feel off, then stop, then come back later when you feel better and try it again. Doing this frequently, most people can build up resistance fairly quickly this way.
Some people claim ginger helps them, or possibly travel sickness medication. But the most important part is to stop playing if you feel ill, otherwise you can train your brain to associate the headset with feeling ill, which is very difficult to get over.