I'm no big fan of Pro Bikes either, and unfortunately A&B Tyres on Hambridge Road ceased trading last year
A couple of weeks ago I was looking for an alternative so I googled "motorcycle tyre fitters, Newbury" and something that came up was a new one-man-band called Paterson's Motorcycle Tyres (or similar) on Greeenham Business Park - took some finding but he's ok and has a brand new tyre machine and takes a lot of care over your rims. Give him a call on 01635 817402 and tell him I sent you (mention slick tyres on Dymags, ZX-10, that might remind him)
