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I was in Whistler this year from January-Late March, whilst there I skied with 191 caylors as a daily driver, slackcountry touring and day touring. At first I used trekkers with them, this of course was unstable and generally irritating. After breaking the toepiece of the trekkers I got a refund and invested in some barons as I could get them on a decent price and ride at 11. Caylors may feel heavy hand but when you're skiing them you don't notice it. Also I didn't really have an issue touring with them I found I was no slower then anybody else I toured with, which was a real mix including dukes,fritschis,dynafit and MFD. Of course my change over were a bit slower as for barons/duke you have to remove your ski and lock them down into alpine mode. For a short review of the caylors downhill performance just check my blog.
For transcievers I like to go as simple as possible, I use a Mammut Element. It has a number of advantages over the Tracker2, I found the display to be much more intuitive and it's directional arrows have a 340 degree display where as the Tracker2's is much smaller.
With regards to avalung I own the Bandit Pack, at 16ltr I find the size perfect for catskiing and slackcountry touring but for day touring it is much too small last I was stashing my lunch in every spare pocket I had, even knee pockets and skins went under my jacket. The next three sizes up are the Agent(20ltr) and the Covert (28ltr) and the Outlaw (32ltr). If I were you I would go for the Covert as it is a much better allround option than the Bandit. Alternatively you may want to consider getting the Avalung Sling, as this allows you to add the avalung feature to any existing pack you have. So if you do buy multiple packs in the long run it will save you money as I am sure you already know packs without avalungs are much cheaper than packs with, this is an option I am considering when my Bandit Pack is worn out.
I fyou've got any more questions just PM me, Joey