I have Metzler ME-880's on mine, and they grip and ride REALLY well. It had Avon Venom's on it when I bought it, I burned the back tire off due to unintentional wheel spin under moderate-hard acceleration and the front wheel cupped and had to be replaced. Mine are blackwall, I can't help you with the white letters... I had Conti Bliz tires on my old '81 GPz 550 and they were really quite good for the time (1987) but I suspect technology has advanced quite a bit in regards to tread pattern and compounds since then.
I'm not sure if this will be helpful or not, but it's my 2 cents
