You have a few items which fit in the "traditional backpacker" class -- the stove, the filter, nalgene bottles, but your shelter is pretty light, as are your clothes.

If you take out the pack (at 48 oz), you are left with 15.5 pounds of gear. You propose putting this 15.5 pounds of gear into a 7-pound pack, making *one third* of your base weight the empty pack itself. Wow.

As others have mentioned, there are many packs in the 3-pound and under range that will carry 30 pounds in reasonable comfort. You might look at the Six Moons Designs Starlite (get the 2 optional stays), and the GoLite Quest, both of which have a "real" suspension. The SMD is <2 pounds, and the Golite is about 3. I have been using the SMD pack for several years, and it easily holds all my winter gear when needed.

Other packs that people have mentioned in lightweight gear forums include the Gregory Z-series packs, various Granite Gear packs, ULA packs (beloved of many hikers), and the Osprey Aether and Atmos series (though the Aethers have been putting on some weight lately).

If you have access to a good outfitter, take all your gear down and start loading up some packs. Have fun with it.

Oh, and you also might play with some lighter food and water gear. Maybe try an alcohol stove and some chemical treatment like Aqua Mira. That'll save a bunch of base weight and bulk.