Looks like a pretty solid list but let me add a few thoughts. I have done the CT but not the JMT so my thoughts are gear more towards that trail.
Water Carrying – On the CT you will be going 20 miles between water, I believe once I went a bit farther. So you need the ability to carry plenty of water. I'd probably carry 4 platypuses.
Rain Gear – If you do the CT you might be rained on a significant part of the day. I would be a bit nervous having all down insulation and minimal rain gear. You could carry heavier rain gear and stay a bit drier during the day. A breathable rain jacket might be worth considering if you are hiking during Colorado's monsoon season. Sometimes the rain last longer then a brief afternoon shower.
A better idea might be a small towel so you can dry off a bit before you get into the sleeping bag at night.
Clothing – I don't see a wind shirt. I loved mine on the CT. If you're using a non breathable rain coat you might want a breathable wind shirt for windy days and very light drizzles.
Electronics – I'd carry one extra camera battery. Think whether or not you will really use the nook. Unless you are going at a really leisurely pace I doubt you'll use it much.
Navigation – I don't see maps or data books. You don't need super detailed maps for the first part of the trail. I mostly used the guidebook but I printed off Delorma topo maps as back up. For the last 150 miles or so I carried Trails Illustrated Maps. You might consider buying the Nat Geo mapping software instead of buying a bunch of maps. I would want topo maps at least in the southern CT. In some places the trail is faint and trail markers can be far apart.
Guidebooks – The official CT databook is pretty good but Eric the Black's guide has a few extra details like info on trail towns, better maps and information on where you can get cell coverage. However in my opinion there is one flaw in Eric's book. He is much more optimistic in what he rates as a "reliable" water source. Peronsally I'd use Eric's guide but remark all the water sources based on what the official data book says.
Packing – You can do the CT with a frameless pack. Just be aware that you have some rather long sections between resupplies and those sections are also the drier sections. Now if you don't mind hitch hiking on some tough roads you can resupply a bit more often and keep the load a bit lighter. Personally I opted to carry a bit more weight and not have the hastle of hitchhiking as much. I enjoyed the longer stretches of wilderness hiking with no town visits in between. If you want to go the way I did you might consider a pack with a frame. Of course on the JMT you'll be dealing with bear canisters as well.
Good luck! Feel free to PM me if you need to.