Welcome to Rokslide RealtreeGirl! I have used a bunch of different packs in the last 6 seasons, and am happy to share what my experience has been if its helpful! My current pack, and the best one I have found for the weight is the KU5200 ultralight pack from Kifaru. It's really lightweight (about 3lbs I think), and handles heavy loads very well. Kifaru packs are just well made, and have an excellent suspension system that allows me to keep the weight off my shoulders so I can carry most of the load on my hips. Here are a few pics of the KU pack in action:
I have also used my husband's Kifaru Timberline on a couple of multi day trips (while the KU was back getting the power pull belt installed), and it was also a great pack, just slightly heavier than the KU.
Haven't had a chance to see the TZ packs in person, so I can't give much info on that...Other packs that I have used include the Mystery Ranch 6500 (great pack, but awfully heavy at 10lbs empty), Mystery Ranch Cerberus (very difficult to get the load off my shoulders, not enough lift with weights north of 50lbs), Granite Gear Vapor Trail (awesome lightweight pack, but better with loads around 40lbs or less), Gregory Jade 50 (similar comments to the Vapor Trail), and Arcteryx Briza (which just never did fit me very well).
Keep in mind that I only ever pack loads up to about 70lbs (which is probably about my max), and usually only pack between 50 and 60 lbs. I am a little shorter than you at 5'3, although that shouldn't make a tremendous difference.
Are you looking for a day pack, or a pack for more extended trips? most of my pack experience is with larger packs, 5500ci or greater, as we are usually doing multiway trips up here in AK and the added space is never a bad thing under those circumstances...
