I've tried the cb500x a couple of times.
Not fun at all. Not enough power.
I feel that the 390adv also doesn't have much power but at least it's light and I can jump it around.

Did considered the crf rally but no new stocks and used ones are selling at crazy prices.
2018 asking for 23-25k
2019 asking for 30k

New ones have sticker price of only 27.5k. But no stock and dunno when will arrive.

Now looking at kawasaki klx 250 and dtracker 250.