I can’t speak to the CT, but the JMT seems unbeatable for constant oo-aa-wow scenery. It’s almost numbing. If i were you, with a month+, i’d do the JMT, but instead of tacking on more PCT i’d plan sidetrips off of the JMT. That way you get some time away from people, and you get to see/climb things that everyone else just looks at and wishes they had the time and energy to do. Half Dome, Cloud’s Rest, Cathedral Peak, a whole bunch of different hot springs in the Ansel Adams Wilderness vicinity, Split Mtn., a zillion other peaks, etc. It would be very easy to spend 2 1/2 weeks on the trail and another 2 off of it.
If you search through the JMT forum on here, you’ll find people’s opinions on resupply. If i were to do it again, i’d send packages to Tuolumne, Red’s, Muir Trail Ranch, and with the kind of time you’ll have i’d hike over Kearsarge Pass and hitch into Independence or Bishop to buy things or pick up another mail drop. Regardless, you’ll end up carrying more than y ou did on the AT, but you won’t h ave the pressure to do 25 mile days.
The guidebooks i think aren’t necessary. Read up on the prep and maildrops and permits online at the links that Jerm posted. Follow up with a couple phone calls. Then just head out with the Harrison map pack. People on the trail with guide books almost seemed more confused by them than helped.
If you have calendar flexibility, i would hike late August or early September, to miss the bugs and the peak crowds of late July early August.
markv