Thanks everyone.

Thought I'd sum up the replies so far for myself and then send it out for other's reference (plus for positive and minus for negatives):


Conti Grand Prix 4 season - +4
Maxxis Re-Fuse - +1
Maxxis Courchevals - +1
Maxxis Detonators - +1
Vittoria Diamantes - +2
Conti GP4000s - +3, -1
Panaracer Duro - +1
Micheline Pro - +2
conti gatorskins - +2
Vredestein Fortezzas - +1
Schwalbe Stelvio - +2
Vittoria Rubino Pro Slicks - +1
Vredestein Tri-Comp - +2
Schwalbe Blizzard - +1,
Tufo elite ride 23 (tub) - +1

Conti Ultra Sport - +0, -1
Conty Ultra Races - +0, -1
Challenge Race - +0, -1
Conti Ultra Gators - +0, -1

Hey I'm no accountant so.. no guarantees on the counts!