In reply to a crap climber:
I'm not sure that I agree with many of the comments here. In principle, there is no reason why you can't have one pair of boots for everything. I dont, but then I am doing 60 days a year of very varied stuff, so have different set-ups for very different purposes.
BUT, modern AT boots (such as Scarpa Mastraele RS) are pretty stiff and i drive large skis on them. For me, and most here in Chamonix, an alpine boot doesnt make a lot of difference unless you really want to charge, and charge on something big.
In essence, the problem at root for everyone is finding a set-up that suits you, your foot shape (the Spectre's a find a bit odd, for example), and how you ski. There's no straightforward answer to that, so I would test/hire skis first in particular and get your mates/an instructor to look at how you do things..
With Blizzard skis you now have a sensational range of backcountry choices, such as the Kabookie, but for me the Bonafide stands out (they're a heavier version of the Kabookie, so better for freeride and what are usually tough and variable backcountry snow conditions - right now in the Alps, for example, you can experience everything in one day), otherwise a 2 ski quiver with one stiff AT boot is a very good compromise, and bear in mind that at this level all decisions are compromises.
I would add, however - as many have suggested - that for most, it takes an awful lot of time on planks to master the basics of ski technique. Most Brits really, really underestimate this. You cant be a great climber unless you do a lot of climbing, and the same is true of skiing, and particularly so of backcountry skiing.
That said, as with climbing, your experience is condition and grade dependent, and not just about your skill level. So pick the right place, and the right conditions and you too can discover one of the best kept mountain secrets, which is that off-piste is often easier than certain on-piste conditions.
Hope this helps,
John C.....