Don't buy a modern Cherry G80 (unless it's for switch harvesting). They're flimsy, bendy, feel bad to type on, have a 2KRO matrix and the keycaps are thin and often lasered off-centre. Also, they're physically massive, yet light.
Can't think of any reason not to buy the two boards I use daily (KBT Pure and GON NerD60 in a Vortex case)... Except, the KBT Pure has the switches mounted the "right" way round, so the LED's are on the "wrong" side for most backlit caps?
Ah yes, don't buy a 60% because Fn keys cannot be positioned in truly useful places on standard layout and it takes about the same effort to move your hand to press the Fn key with your thumb (or hold it down with a pinkie) as it would to move your hand to the arrow and edit clusters... So actually a TKL could still be less effort to use or save the already overworked pinkies from more strain.