If you're speaking of the Slim Par Pro Tri, the Map is $ 399.00 for this 54w RGBfixture. You might want to compare it with Blizzard's Puck Q12/A which is a 120w quad diodefixture featuring 12 - 10w RGBA diodes and MAPs for only $ 299.00
I have 10 slimpar pro tri fixtures and running a software based console (ChamSysmagicQ). I find the dimmer curves are smooth, and are not lacking in brightness either. I have used 5 on front and 5 on back truss and have been able to wash a 40x32 stage. Hope this helps