I got a HUANUO Aluminum Monitor Stand for £40 from Amazon, arrived yesterday and seems to be well made and a decent arm. I wanted one that would support my 27" fine but also have a decent footprint on the desk as lots of the cheap ones (I still think this is cheap mind) have very small footprints which I feel is potentially sketchy. The base on this one isn't exactly large really anyway, just a bit bigger than the super basic clamps that some come with.
The reviews seem to be decent enough for the one I have and it looks to be quite a solid unit and works well, having adjustment on the damper is nice, means the monitor is easy to move around should I want but it'll stay in position wherever I leave it (I know lots of them are fixed position arms).
The clamp has quite a large range on desk/worktop thickness too, up to 85mm, mine is only 20mm so a large amount of that isn't needed for me.
