AEV kit is more complete and geared towards touring. It has a firmer suspension setup than other kits. It's better if you can take a ride in both kits and feel for yourself before you decide.
For roof rack, you can take a look at frontrunner slimline II. It's mounted to roll bar, so would have a much higher load rating than RhinoRack Pioneer Platform. JKU version is rated 600lb/270kg moving weight so I presume JK version would not be too far from this as major mounting point is the same. It's also light weight and low profile. The only thing is that you need to drill thru the top. It's works with hardtop and no top.
Not sure if you already have rear bar done and looking to do it, try look for a bar + tire carrier combo with jerry can holders.
LeighP already given you some good advice on other parts. Good luck on your build.