I'm not sure what your budget is, but if you ar thinking of a few new gear items, you might reconsider your pack. At 42 oz, it's a bit heavy. As a comparison, the GoLite 50L Jam 2012 is about 30 oz and the 35L Jam is 26 oz. Both are priced half-off now at Golite.com and if you open an online account (free) with them and submit a review of any item on their site, they will immediately send you a 20% off coupon.
No, I don't work for GoLite, but I have a 2011 50L Pinnacle (same as this year's Jam) and a 2011 35L Jam. Both are great packs and carry well. I did a thru-hike last year on the CT with my Pinnacle and it worked really great. I'm doing the JMT this year in August, so I may see you there, and I will probably use the Pinnacle again. BTW, it sounds like we're similar stature, I'm 5'-2" and 110 lbs.
Be that as it may, there are other UL packs out there that weigh even less, but I found that none of the cottage industry guys made a pack to fit me, so I went with the GoLites.
Bear can - you might find the BV500 is more than you need. I also was going to use the BV500, but then another poster here clued me into the fact that a bear can is not needed for the entire 10 day section leaving MTR SOBO to Whitney Portal. So you could start with a few days worth of food outside the can, but it a locksack for example to be safe. Once I found this out, I opted for ther BV450 instead. That would save you 8 ounces.
Tent. I have the Gossamer Gear The One, which with lines and stakes, totals just under 18 ounces. Although I had some issues with it on the CT, I had some work done on it by GG and I plan on taking it on JMT this year.
I think the other posters here offered some good tips on your other gear.
Hope this helps.