In reply to ParaDan:
I have done West Highland Way over in Scarpa SLs (B1s) over 3 days (so 50km a day with camping gear), as well as overnight trips with La Sportiva Nepal Extremes in not so wintery conditions (wet snow and lots of bogs/river crossings). Yes, I survived both times, but did I choose the right boot? Probably not, but in both cases they were the best choice from what I had in the cupboard. Nepal Extremes get soaked through after a while, which means they become even heavier. I got mine for £90 quid (used for under a week in Alps? they looked worse after first time I got out, so...).
From my personal experience, don't get the best boot, just something that fits and is cheap. You'll know what you need with more experience and also you won't be scared to ruin them. On my 5th or so day out in winter, I stepped on my boot, with crampons on... I'd be raging if they were £400 boots.
Also, I am not sure if you can plan what you'll be climbing in X months/years. I started gym/sport with no intention to climb trad, transitioned into trad quickly and it became my passion, started soloing more often (never intended to either), went to Dolomites, spent many days climbing multi pitches and shortly quit rock climbing. Completely.