In reply to garethb: ~If you are asking model of boot, no, go to shop/s try boots on, get assistance from good assistant, buy boots that fit, there is no such thing as a size 10.5 boot, but there is a 10.5 foot, but thats only 1 dimension, of a 3 dimensional object! and generally, a 10.5 boot does not fit a 10.5 foot.
i am not even going to say stick with X brand as all models vary on shape
sorry for getting pedantic, its getting late!
depending on what you are doing/planning on doing would depend on what you look for in a new boot, you have B1, so generally I would say go straight to B3 if you are wanting to climb, i would then say get crampon for that purpose, then bodge(fit flex bars etc.) to use crampon on B1 in limited winter walks scenario, if you only ever aspire to easy gullys, alpine classics and long mountain days etc. then get a comfy B2 to use for all of that and then use current boots as summer scrambling ones and never use in winter, then you have crampon and boot for job.
sorry if thats made you confused
p.s. genarally all degree lite was a B1, or B0.5 depending on age, if you have boots on can you happily stand on skirting boards? or with all weight on one foot, up on toes, how much does it bend?