Right now plasma is the best (in terms of contrast and color). But soon there will be a new HDR technology (High Dynamic Range) which will be put in TVs and the contrast ratio on a plasma is 1000:1 were as the new Brightside DP37-P will have something like 200,000:1.
That doesn't make them suck, you just have to not be a dumbass. As far as picture, they blow a rear projection away, especially when it comes to viewing angle.