I must admit to having become a fan of Continental GP 4000 SII tyres (now superseded by a supposed even better GP5000).
I have run 25's and 28's (depending on bicycle clearance) year round for over 2 years now (15000+ km) with only a single unscheduled deflation due to a shard of glass working through.
They roll REALLY fast and, with a 330 tpi casing, are supple and comfortable. Chalk as cheese speed and comfort wise compared with Marathons.
(Tyres used up so far: Stelvio Plus, Stelvio, Durano plus, Marathon, Marathon Supreme, Marathon Plus, Bontrager AWS, Marathon Winter)