More adjustability & wank-factor with the KYB air-assist shocks, I don't think they workmuch better than rebuilt std KYB's. I have both on my 250A5's
I got Rodney at Radd Supension in Qld to rebuild my A5 stockers, did a great job at a great price. Get the stockers rebuilt and swap back and forwards between the two.
If you want to win races, I think current Ohlins with adjustable comp & rebound would be the go.