If you open 3C, you should gird your loins and be prepared to REBID 4NT if opps steam & scream into 4S (maybe even 4H?) THAT will surely stun the viewgraph audience!! But for me, I'll put my money on opening 3NT (we play NUMNUTZ, so that = 1-suit 4C OR 4D preempt(6-7 winners at these colors), saving 4C & 4D openers as strongish 4H & 4S pumped-up "preemptz". 3NT still gives you a chance to play 3NT, you gotta admit! :)