Well, I would recommend you to stay with the standard version.
The additional sceneries included in the more expensive versions are not really worth the additional price, and at some point you will probably be able to get some payware or freeware alternatives to these anyways.
The additional planes included in the more expensive versions are completely not worth it:
- they are beautiful, yes, but their level or realism is very low, just like all the other default planes
- their files are locked for edition/encrypted, which means they will not benefit from mods made by the community
Concerning my last point above, I can give a simple example: the default Boeing 787. It has a very beautiful 3D model and cockpit. But its flight model and instruments are said to be terrible, and the community can't do much about this, because the files of this plane are not editable/accessible.
On the other hand, the default Airbus A320 was in the same situation initially. However, a group named FlyByWire offered a very nice mod (addon/patch) which drastically improves the flight model and the instruments/switches in the virtual cockpit. They have fixed a lot of problems, added a lot of features that were missing, and this is still on-going. Every once in a while, a new version of their addon is released, with additional features/fixes inside.
Same goes for the default Cessna CJ4 business jet: it also benefits from some mods made by the community. In fact, these mods were so good that the team which made them is now contracted with Asobo to collaborate with them.
TL,DR: take the standard version. The other versions are a waste of money.