Cool. I was mainly curious about how many consider the lineup to be the vital element in the decision and also how important having a GB is to you as well.
I dunno, I guess for me it ends up costing somewhere around $550 for the whole 4 night journey - but I can't say that I ever had anything short of an absolute blast each of the three times I've been there. It's not just about partying with you, Amman, Greg, Paula, Britt, Mark, etc., but the festival organization itself (relaxing pre-party, nice merch area, separate bar area, excellent arena) and the unexpected that always seems to happen (partying all night with Joh Schaffer at PPIII, the amazing Queensryche karaoke girl at PPVI, discovering the live power of Tad Morose, Edguy, Circus Maximus, Brainstorm, Symphorce, etc.).
It's just become a can't miss festival experience for me each year. Even though $550 or more sounds like alot, it's still an inexpensive way to experience the festival atmosphere on an annual basis as opposed to the Wackens, Sweden Rocks & Gods of Metals of the world.