Depends on the look you want. While you can produce the same print on any head, a condensor head (the cheapest) will give you a different look than a cold light head. Personally I have both, so I can switch between the 2. Now if you are only considering a cold light head and a color head, I'd choose a regular, non-VC cold light head. They are usually faster than a color head, you don't have dials to screw with (both VC cold light head and color head) and they work on all papers. They are simple and less likely to have something go wrong with them. You will need a compensating timer to go with it for stability and predictability of light output each time, but those are just as easy to come by used as the head is, and have some other good features, like drydown control and variable light output (full on or dimmed for slower light output for precise dodges).