Hi Tailor,
Welcome on these forums!
In order to decently play with any software synthesizer you obviously need a MIDI keyboard; there are plenty of models anywhere, I cannot give you a preferred model as I don't know your needs & budget. CME, Edirol, Novation, M-Audio, Korg... and many more manufacturers now have complete range of cute keyboards.
Just think to get one with many knobs, encoders and sliders, as the CS-80V and other vintage analog synths usually require many parameters to control, and it's far easier to do with knobs than with a mouse/keyboard (well, strictly from my point of view though, automation-addicts may purposely contradict).