The list is not comprehensive. I know of a hand full of good agents not on there. Abbey, Aitchisons, Rumball Sedgwick, Collinsons to name but a few. Why Oakleaf are on there I don't know - they're the part-exchange dept of Barratt Homes...?
My answer to the question is - 'one which feels right'. It's not just about valuation if you're intending to sell. Ask about what deals they've done in the past few months - deals not properties under offer.
55k - 75k pa + Bonus + Pension + Healthcare
35k - 60k pa + benefits
40k - 60k pa + Bonus + Pension + Benefits