which version to Buy?

If you need it now, go with 135. Stable and well supported here. Many mods available.

If you can wait another 2-3months, go with v2. I believe, SP1 will be available soon and some mods hopefully converted. It’s really up to you and what you need. Compare features first. But there’s nothing wrong with 135, which is still far better than most of the latest available e-comms and some people run their businesses and probably will for the next years. Good luck.

1.35 SP4 is still the best!!!