The ATiK 314L+ is quickly becoming the "weapon of choice" for amateur spectroscopists.
Certainly does a great job.
I also use the ATiK16ic-S as an electronic finder (Using a 135mm telelens) and still have the ATiK61ic as a guide camera.
With a bit of fanct footwork is is possible to get AstroArt to recognise them as separate cameras, so operating two ATiK cameras at the same time.