In reply to BruceM:
I got a pair of Trango Tower GTX's earlier in the year for alpine use (I have Batura's for proper winter). I really rate them, and for up to grade III scottish they'll be absolutely fine. Above that and I'd probably want something stiffer. They're also the most comfortable boots I've ever owned and have good precision for scrambling, as well as weighing very little.
The downside is that my Airtech's dig into the rubber rand on the toe, which I can see causing issues in future with excessive wear. Also, the good scrambling grip comes at the expense of longevity, and I'd say that the uppers won't last as well as some other, tougher boots. They do have some clever use of heavier and tougher materials in high wear areas but even so, it'll be their downfall eventually.
I never once got cold feet in the alps, even when it was down to probably -10 with windchill, but as I was moving all the time I think the reality in Scotland would be very different if you're standing around on belays a lot. I reckon for big days on grade III terrain where I'd be moving quickly I'll be happy to use them but for other situations I'll still revert to Baturas.
My Baturas did two full seasons before needing resoled as a result of the midsole failing and thus dropping crampons more than once. I resolved this towards the tail end of winter when the problem got worse by just using a strap on front bail but it wasn't ideal. But £135 for a new mid and outer from Feet First seemed reasonable to give new life to them, and they came up perfect. The Towers are similar in that they can easily be resoled, for about £65 (just the outer) once they've worn. I'll probably end up using them more regularly than I'd originally intended and just get the resole, rather than buy yet another pair of boots for general use.