If you want to get serious about flight simming, especially with a thing like Blackshark, you may want to consider getting a HOTAS and pedals. You cannot seriously fly any helicopter in realistic mode without pedals, that'S like a car without steering wheel. And if the sim is an orgy with switches and buttons, a HOTAS is highly reocmmended. There even is the first
FF-HOTAS out, simHQ just previewed it:
http://www.simhq.com/_technology2/technology_158a.html
If you just play around a bit, simplifying flight models and not caring about realism but wanting quick arcade action, a single stick is okay. If you really want the illusion to handle a real flying thing, you need pedals and separate throttle and stick.
Consider TrackIR, if budget allows it. It's worth it, really.