Pho3nix
The Legend
What I can say from personal experience, is Bridgestone Adrenalin R002 >> Bridgestone Potenza RE050 Runflats (comfort sucks) >> Kumho something or other (KU31 I think) that reviewed better than the RE050s.
The Kumhos just dont have enough grip. It has even less than the RE050s have.
For price comparisons, I check Errol's tyres and go from there. The are one of the few places with prices on their website.
http://www.errolstyres.co.za/
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Seems we have the same taste in tyres