The Flex line is very good on AM transmit, but you have to be a discerning pilot.
OTH if had that badass transmit hardware?
Hell yes. The best AM transmitter I ever had?
Eico 720 with a reverse engineered/cloned
Eico 730 homebrew plate modulator.
I could not afford an SSB rig at first.
This kicked ass on AM.
Later, I built an HW-101, I got an employee discount for volunteer work.
HS ham radio club built modified Heathkits for Handi-Hams.
I enjoy the hell out of getting on AM still. My TS-850 does OK.
But the Flex is better on AM RX, hell yeah.