I would classify all of these as being for an "advanced" flyer.

From the mix of your planes it sounds like you are advancing out of intermediate....

The Bobcats fly differently than any of the planes you are used to.

I'd suggest starting with the .25 to minimize complexity ( fixed gear only ) and get you used to flying these things.

Throw a glow engine on it and you'll have a blast with it, yet if you crash it the costs will not be seveare.

If you like the .25 you can always move to the .50 later with it's retracts, etc.