In reply to Neil Adams: I take it you've been to the Tiso Outdoor Experience shop on Couper Street as opposed to the Buchanan Street branch.
Have you tried the Tiso at Ratho? It's a bit more of a specialist climbing shop than the "everything outdoors" approach that the other branches tend to have.
I would never buy boots online*. Especially with winter boots, you really need to have them properly fitted to avoid pain, grief, disappointment and wasted money.
* Sole exception: a second pair of something that I know from experience is right for me - and I've only done that once. I wouldn't buy anything from 5.10 online because their sizing is so inconsistent!