Agreed- you have a great list coming together and it will pack small. The G4 is a monster. Sweet pack, but I'd consider this more of a winter pack when you're carrying lots of insulation.
You can find my review of the Thompson pack on this site- might be worth a read.
I'd look hard at the GGear Mariposa Plus, the Golite Jam, the ULA packs, and those from Mountain Laurel Designs. Something in the 2500-3000 range might work out better. Lots of reviews of many of these on the site. Look under Articles- Gear.
Here's another idea- buy your pack last. Get all of your gear together after you've got the weights low and you're close to your final size. Then you'll know you've got the right pack for the job. If your kit is in transition, you'll likely need a pack in the short term that might not satisfy in the long term.