Rear brake options

Something to consider also is what kind of axle bearings each kit will work with. If you're planning on running green bearings it doesn't make a difference, but if you want to keep the stock style tapered bearings most of the rear kits out there don't work with those. There are a few that do, I know Dr. Diff's rear disk set up does. I'm not personally familiar with the one's you listed, so it would be worth checking. If you're not already running green bearings anyway.