I sure have checked out moving heads, they are some great things, totally love them. But the good ones take a lot of place and are very heavy so are'nt that suitable for a small drive in, if you have some kind of van they woold be good! The par's are just for some basic lighting to have something that can do a simple pattern like from left to right on the beat.
I do hate those mushrooms too, I think they're a bit cheap looking, for an effect like that i'd rather buy some cool led effect, just for the center/ceiling.
A laser is really cool, but remember it's not suitable for any place! Anyway I do think it's the most special effect you can get nowadays but the blue lasers are starting about €2000. Therefor i'd rather buy a good quality RGY laser.. Check out the ones from laserworld in Switserland
www.laserworld.com For 250-300 euro's you have a great scanner. The Martin SCX500 is the best that priceclass I think
cheers
