All hammer-action keybeds are a compromise; it's largely a question of where that compromise lies.
The E-mu E-Synth / E4K was one of the few sampler keyboards with a 76-key, semi-weighted Fatar TP-8 synth-action keybed; it wasn't the best for piano-type articulation, though one could certainly achieve a decent result with a bit of adjustment.
I own a Korg T1, which uses the same keybed as the leaf-sprung*, weighty-weighted Yamaha KX-88 - this works fine for me (Pianoteq and other sample-based instruments notwithstanding), though I'm leaning toward the X (also semi-weighted, though a TP-9S if I recall correctly) as it might be better suited for synth- and drum-oriented playing.
We shall see: right now, there are about five or six devices that the Prophet X(L) could replace in one go, which requires that I distill the things I like about those existing units into a single device, which I'm not entirely certain _can_ be done.
* - Yeah, I was a DX7 keybed fan too.