I have already purchased the 520, and it is on the way to my doorstep as we speak, but I also just got the confirmation email from Outlaw. I am thinking about purchasing the Outlaw and doing a comparison between the two pre/pro capabilities, and seeing which one comes out on top in comparison to the price. If anyone would be willing to purchase whichever one of the units I do now decide to keep at a reasonable price, then I would be glad to do this comparison. Any and all inquiries would be great. So if I can get the ok from a couple of guys who would be willing to purchase the unit I decide not to keep, then I will definately go through with the comparison. Oh, and BTW, the 520 is from OneCall, so there is a full manufaturer's warranty on the unit. I just couldnt help myself, at $570 shipped it's a friggin steal!