Looks interesting, but I wish I could add 3rd part VSTI's... and that leads me to the Steinberg's VST LIVE that should perhaps develop into something good...
Opsix is probably one of the best fm synths out there , if not the best... Never had a chance to play DX-1 back in the day...
I like the Wavestate, but it needs great discipline, super organised mind-flow and patience ?
I say go for it Fleer, but get the SE 61 keys version instead, I think it's worth the additional price of admission... The basic Wavestate hardware was a bit disappointing for me.
Both Wavestate and Opsix are absolutely great... @96kHz session they are so close sounding to the hardware that with little Eq adjustment you're pretty much there... of course no immediate hands on, but Wavestate Software is actually in most cases almost easier to program than the hardware synth and things can be mapped to controllers... so I think they are a winners!