You being in Florida TBM is a good place to buy from. DLE is the best Chinese engine, DA is the best USA engine, DLE liked it so much they copied the 50 and made the DL50. The DLE55 is slightly more powerful than the DA50, but the DA60 is a lot more powerful than either of them.
The idea of picking up a used DA50 is a good one.
No thoughts on those plane, I've never had either, but I do love Yak54s and Extra260s.