In reply to mick taylor:
Not trying to be a smarter$e, but boots that fit correctly will be best. Altberg do a range of width fittings, so it could be worth a trip up to Richmond to try some on. I happen to fit Lowa boots very well and have been very pleased with the 'munro' model for scrambling and winter walking. SWMBO has the Scarpa Mantas, which, as you say are very popular, but that may just reflect Scarpa's global marketing. Whatever you choose, get them fitted - a good fitter/sales assistant should be able to advise and also make adjustments e.g. volume adjusters to ensure that your feet are held snuggly in the boot without excessive movement, yet still have enough room (SWMBO is a podiatrist and goes on forever about this stuff!).
Other than fitting, a good protective rand helps avoid damage to the upper when scrambling.
FWIW I use, depending on season: Brasher Supalight, Lowa Munro, Scarpa Omega.
N