I think if you feel confortable with turboprop and fly the Baron nice, you can go for a king air 350. If not TBM is an excellent option as next step as it will give you skills for fast reaction, proper approach with a heavier aircraft…
I wouldn’t go for a jet before mastering a complex turboprop or twin like king air 90 or king air 350 as the flying qualities are different.
But of course is your choice and we will be here to support you and help regardeless of hour decision. Happy flying!