You could save your pennies & get a Mamiya 6 or 7. Leaf shutter, Flash sync @ all shutter speeds and silent operatontoo. If you're shooting dance from a given distance you could prefocus(which you'll have to do with the Pentax anyway) & they're MUCH lighter cameras with excellent lenses.
6 gives 6x6 neg.
7 or 7ll gives 6x7 neg & a 35mm(panorama) adapter is available too.
Think Leica on steroids