Well, if you can choose, pick the JP-8. It's bigger and better in every way. What they mean is that the cheaper, smaller and excellent Jupiter-6 doesn't have all or as much of the features of the JP-8.
Another option is the rackmounted MKS-80 with the programmer control panel. It's a rackmount JP-8. It's not as much fun without the programmer though. The programmer is called PG-80.
-tek
[This message has been edited by tekminus (edited 06-10-2002).]