Right now, some of the lighting companies are starting to come out with LED PAR cans. These have several VERY important advantages, IMO.
Firstly, one can can do many colors (they have red, green and blue LED's, like a TV, so can make almost any color), so one can behind and two in front (or whatever your budget allows) can give the effect of a MUCH larger show.
Secondly, they give off no heat, so, although they aren't quite as bright as say a PAR64 can, you can bring them in very close (which most rooms dictate, anyway!) without frying yourself...
Thirdly, the bulbs last about 100,000 hours, basically, forever!
And finally, they draw next to no current, so you don't have to worry about separate power circuits (or even legs!) and your lights 'browning out' your PA or even your keyboard! (And 'green' technology is a good thing, too!)
American DJ has a good selection, take a look...
(Disclaimer.... I don't have a set yet, but have seen them in action, and am considering them to replace our light show next year).
_________________________
An arranger is just a tool. What matters is what you build with it..!