The only reason I have Konis on my 968 is that's what came with the M030 option.
I've always opted for Bilsteins on my BMWs and wouldn't hesitate to use them on any Porsche (including the 968).
Bilstein developed and offers it's PSS9 coil-over system. If there's a PSS9 system for the 944/968, I wouldn't hesistate to go in this direction.
AC Schnitzer used custom spec'd Bilsteins with their pricey and extensively tested spring/shock upgrade package. We installed a lot of these set-ups back in the ninties.
Otherwise the Bilstein "sport" model would offer excellent performance with great ride quality. This was the direction we took our customers if they couldn't afford the AC Schnitzer complete package (e.g., with the AC Schnitzer lowering springs).
Porsche