There's about a $200 dollar difference in price of the radios, although you'll make that up buying the Sanwa receivers.
Is the Sanwa M17 over-hyped? I don't think so. As their flagship transmitter it will have the fastest response times and most tuneability.
Does that Make the Futaba inferior? Doubtful you'd notice a difference.
Find the one that fits and feels best for you. For me, it was Sanwa. This after many happy years with a Futaba 4PLS.