I've had Bridgestone, Continental, Dunlop and Yokohama on my various cars.
The Pirelli's hands-down beat them all on grip. They are relentless i mean i've tried pushing my car to the limit to get the traction-control and ESP to do something and it just doesn't (it does in the wet but even then not as much as my other cars used to) . Granted they're 255/40 so also have more road coverage.
But when it comes to comfort, and reliability without issues they're not up there. I would probably give that to Continental and Bridgestone - I never had issues with them at all on other cars.
Michelin i won't touch ever again. Two separate vehicles had major problems with them - with one, a new car at 1 year old and 8000KM had pieces of the tyres peeling off on 2 separate wheels at different times and revealing the inner lining and Michelin claimed it was due to the "road conditions"...