Looking for advice on BC ski set-up

I'm new to back country skiing, so am looking for a used set-up. I'm 6'1 and 170 lbs. Been skiing for years. Any suggestions on skis and bindings I should look for?

First and foremost, figure out your boot options first.  It breaks down to do you want Dynafit compatable or not?  It is the lightest option out there, at about 1.5 total lbs for the set of bindings.  Personnally I have been using Silvretta 555 or Easy Go for years and they where the lightest at 3 lbs until Dynafit came along.  However, if I where to start over I would spent the extra cash and get a Dynafit compatable boot.  Last thing for boots, shop fit not price.  I have been on outings with guys that part way through a tour there feet are killing them from a poorly fitting boot.
Climbing skins don't require much discussion, the new tip hooks by G3 are nice.  They solve alot of wide tip fitting problems.  I also prefer to have a tail hook. It solves alot of skin glue problems, especially in the spring when your skins get wet as the day progresses.
Ski's.........talk to ten different people you are going to get ten different opinions.  I personally have three different pairs that all get regular use, depending on the snow conditions.  I switch back and forth throughout the winter between a pair of Karhu Jak BC's and Icelantic Shamans.  The Karhu's are more for firmer pack days and the Shamans are for the deeper heavy days.  My third pair is a set of Alpina X terrains.  They are a pattern base ski which is a little slower but great for long tours or rolling terrain where I don't want to mess with putting on and off climbing skins.  All are set up with Rondonee bindings. 
Well I hope this helps some.

It might be a good idea to move this to the Random Tracks part of the forum. Otherwise, the suggestions here will likely have more to do with what someone is selling rather than what's good for you

Thanks for the feedback -- this is great info! I'm sort of making this investment incrementally, so am looking for AT bindings that would work with the downhill boots I already.

as of late there have been several 'rigs' for sale on the yardsale page that could work w/ alpine boots. Several listings on craigs list too. Fritschi or marker (duke/baron/tour) setups are pretty popular and will work. You will want to make sure the binding size will accommodate the BSL of your alpine boots.

if you do buy new boots I'd 2nd the comment of considering dynafit compat boots so you can go lighter in the future.

also, Marmot in Bellevue and I believe Pro ski north bend (probably others too) have good stuff to demo. You can try a fritschi or marker setup w/ your alpine boots and a dynafit setup w/ rental dynafit boots to get a sense of the difference.

The problem with the Marker line is they are HEAVY and the switch from tour to ski requires allot of hassle. I have a set of Fritches, they are nice bindings a little heavy but nice bindings. The Silvretta will work with any ski boot. I used them for a couple of seasons prior to purchasing Nordica Tour Lite boots.