Augustus, a similar pair to that fourth pair that you posted - the Meermin - might be the Alfred Sargent Culford (on their 89 last) or the Alfred Sargent Cambridge (on their 87 last). The 89 last comes up a good shade generous in my experience of the Culford boots - I would suggest it is designed for thick country socks.
Your second link is cut short, but I presume it was for the Loake Bedale in mahogany? Loake 1880 range are reasonable however I haven't ever been entirely convinced.
If you are in the UK, they are easy to try for size - the Pennine last is used in a number of models. For me I found it had a fair bit of volume in the instep, and so regarding sizing you may be able to go a half down on your 'regular' fit dress or formal shoe size. Again, it's meant for thick socks though, it isn't a dress boot by any stretch.
I do not like the new Grenson 'G Two' range, the leather seems particularly poor to me. Well, they are made in India. That said, the 201 last is a very comfortable fit in my experience of their Archie brogue.
Alternatives...? Loake Dovedale or Barker Lambourne perhaps ... or if you find another wad of cash, something from Crockett and Jones.
Check out Pediwear of Halifax, great people at the shop.
Thanks, that's really helpful. I'll look at all of those now.
I mentioned segs earlier, one of the reasons I mentioned leather soles is because I've always had metal segs fitted to leather soles to make sure they last. It means I'm put off by rubber soles - am I right in thinking I'd only be able to get rubber segs fitted to those?
so for example - http://www.loake.co.uk/loake-1880/dovedale.html really like these, preferably in a darker colour but I instantly move on from them when I see the rubber soles. Maybe I'm, being foolish so thought I'd get some clarification.