I am not the guy that changes vehicles often, I like to stick with my stuff, not sure if I just like my stuff or to spend less money, both I suppose.
So I'm still with my WR300 2010, doing some engine rebuild right now to keep it going... But from time to time I think about getting a newer bike, I won't go with the orange brand so the newer white 'orange' bikes they call Husky won't be an option for me.
I like the Beta enduros, nice bike and engine, but the suspensions is not that great (Sachs). Sherco is not my favorite either, The new GasGas is a decent bike, have tried them and it's not bad, much better than the previous models, and it come with KYB suspensions. And finally TM's, I like them because they are more exclusive and come preloaded with all good parts, don't really know that much of them because nobody uses them around here, I think I never seen one in the forest. I read in a forum that the electrics could be better and that most of the parts need to be ordered over from Italy (at least here in Spain the importer is so-so), only OEM plastics available AFAIK... makes a few things more complicated and expensive to fix.
I would really love to try one of these bikes as I have no idea how they handle. As you had a WR250 before, would yo agree that the TM is more 'racing' and violent kind of power delivery ? Less suited for slow enduro (trials like) riding ? I think that TM is more suited for cross-test kind of circuits and not the slow stuff but I may be mistaken.
The 2019 model is about here, they come with electric start, the first models will be carburated but the models selling 2019 and onwards should be injected (here in europe). I would always prefer the carburated version over a new, untested, injected model.
Another thing with the TM is price, it's much more expensive than a new GasGas....
Cheers !