Dave,
Check out some of the local gear shops like Marmot in Bellevue. They tend to have lots of used, good condition skis/bindings to choose from. I'd say focus on the boots though. Find a pair that work well for you and then decide what to attach to them. Its worth spending more money on the boots since they are what will make you miserable. Once you find some good boots see if you can set up a demo arrangement with someone to try out different binding and ski combinations both in bounds and in the bc (including going uphill here). Some places will run demo days at some of the ski areas and these are pretty good opportunities to try a bunch of stuff fast.
Within a binding class (AT or tele) I'd be less worried about weight and more worried about beginner friendliness. I have Fritschis on my Mt Bakers and 7TM power tours on my tele set up. Both run a little heavy but the 7TM is releasable and has a nice touring pivot (you want that). My Fritschis are really easy to get into regardless of the snow conditions but are heavier than Dynafits. I've seen a lot of new bc skiers come with Dynafits and take forever to get the boots into them. So if you go that way make sure you can get into the teeny tiny posts easily regardless of the snow conditions (soft, deep seems to be the worst).
Also make sure you get proper safety gear and training on how to use the gear and how to avoid needing to use the gear.