I had Sport Maxx's, got some cheapo one on the back now due to a puncture and being broke, but the front 2 are Avon ZZ5's. The most quiet tyres I've ever known. Even compared to anything I had on my ST which was a lot more quieter than the roc.
When you get tyres again... Seriously, go for the ZZ5's. Decent price, awesome handling (in dry and wet) and very quiet.