The following is just one guys opinion, but I think it is worth considering.

The filter's value on tour varies widely depending on where you tour. I don't think it makes sense to take one on a Pacific Coast tour. I did really appreciate having a filter last year in the Sierras though. The best thing about it was that we had long hot stretches, but nice ice cold snow melt streams. It sure was nice to have cold water once in a while. That said on the coast it isn't likely to be terribly hot and tap or bottled water is pretty frequently available.

The Jet Boil's forte is boiling water quickly and with minimal fuel usage. That may be what some people want/need, but on most tours fuel is readily available frequently. If carrying fuel for longer periods the Jet Boil might save weight. I'd rather just buy fuel in smaller quantities more frequently. The OP's choice of an alcohol stove supports that style nicely. Personally I'd rather use a pop can stove rather than a Trangia, but that is another story.

Some good input here already. I would just add a couple counterpoints to some previous comments.

I did a short backpacking trip at Pt Reyes National Seashore one summer. I had a summer rated sleeping bag and slept under a tarp. Let me tell you, I spent a couple foggy, windy nights by the ocean there, and I was cold, baby, cold. So your tent and 20 degree bag looks good to me. (My avatar pic was taken during that trip. Yes, I am wearing jacket, hat, and gloves in summer.)

I think sporks are great, but not all sporks are created equal. Get one with long prongs rather than tiny, stubby ones. I also prefer a solid handle over a folding handle, and metal over plastic. A spork and a small, lightweight, folding pocketknife covers all of my utensil needs.

I also prefer synthetic t-shirts over cotton, for reasons already mentioned. I recently picked up a couple solid colored Adidas sports t-shirts on sale at a department store for like 12 bucks each.

Handy tip: If you're bringing duct tape, take the necessary amount off the roll and re-roll it around a short pencil (can also be used for writing).

Strange, but I had that exact same experience; I always forget that at most of the Point Reyes camp grounds, the ocean seems to jump up and invade the camp site at night. It really sucks being too cold to sleep. At least I learned my lesson with that one. With a double walled tent, a 20 degree bag might be a little overkill, you could probably use a 30 degree one and save a few ounces, but it's a minimal advantage.