great feedback, thanks Scarebear!Other posters have covered most of it. Weight priorities, for me, would be as follows:
Save 2 pounds on your pack.
Save 1 pound on your shelter. You are coming in over a 2P ultralight tent with your system.
Save .5 pound on your med kit. Pare it down.
Save 1 pound on this "butt pack" thing....unless that's code for your sanitary items....
Save .75 pound on you bear spray, unless you are in bear country.
Save .5 pound on the kindle. Get the kindle app for your phone.
Save .75 pound on the cotton shirt and board shorts
Save 1.25 pounds on the thermal top and bottom.
That's almost 8 pounds, right there. However, you will need to add the following weights:
Light weight synthetic hiking short sleeve T
Light weight synthetic hiking long sleeve zip T
Possibly a light weight synthetic bottoms....but likely you won't need these hiking...
You are also underestimating the weight of your water. 1L of water weighs 2.25 pounds....
You also haven't factored in water purification, water storage, food storage(bag and rope for hanging) and waste disposal(how much of your food/paper waste stays with you...)
Don't count your poles....
It should not be terribly difficult to come in under 30 pounds, dry, including food. I've spent plenty of 1 week hikes on the AT in Georgia and NC with my dry pack weight at 25 pounds, food included.
You shouldn't need more than 5-7 days of food at any one time on a thru-hike, if you plan your re-supply carefully...
Good luck and have fun!