[MODERATOR EDIT : too PreenFM-specific conversation from “Is this FM?” thread was moved here…]
I like PreenFM2 ! (VanDaal is currently selling one — new+assembled— for 265€ btw)
The form factor makes it hard to have plenty of knobs, thus the menu diving. But it’s simple enough to apprehend I found.
And you can drive it from any of the old Elektron trinity…
I found that it doesn’t do that bright sounds though, I don’t have deep enough knowledge to know why.
Volca FM is quite good in this area. And it’s internal sequencer is already much fun 
Yet it’s not as controllable as PFM2.