In reply to James Malloch:
I had the same problem, and after trying on loads of different ones, i came across these Quechua ones by accident while getting some running trainers.
http://www.decathlon.co.uk/jawar-50-id_8125864.html
I'm very fussy when it comes to my outdoor gear, and am a bit of a gear geek. I also work in an outdoor shop so get staff discount on ones like scarpa crux, five tennies etc. And i've used and worn out a few, so i know what i'm after for replacement.
These are £40, but were £30 when i got them the other week. Great grip on rock (not for climbing though due to thin lugs), but more for boulder hoping such as on approach, super breathable upper! Like i mean super breathable. But their rugged sole, and tough patch reinforced sides mean that they are burly and hardwearing, and also works to keep water out up until the mesh, which starts quite high.
So all in all a great approach shoe! Light, breathable, burly, gripy, and only £30! I'm very impressed with mine indeed.