Not sure what you're telling me, I was answering a question, not
asking one, but as always you trade one thing for another with tires.
The tread design makes them more quiet, not the tire brand. Myself I
gave up on Michelin a long time ago. To hard as they age and traction
sucks. With their tread design they should be more quiet but don't try
pushing them like you can the OEM, which is also a compromise.

Right now I'm running Goodyear, Dunlop, and Continental, of the three
Continental is my choice followed by Dunlop and then Goodyear. Only
problem is that Continental does not make an ContiEtremeContact in 19"
for my C6 or I have them.

I must admit the price looks good on the Michlin ZP for the C5.

Here is some of the reviews from the Diaper owners.......

"They are heavy, have modest grip, and they wear out in 12,000 miles.
All standard run flat characteristics. But, they won't leave you
stranded if you have a flat. Which is why I bought 'em instead of more
grippy choices that were avaialble. If I took the car to the track,
this would have been a poor choice. But for the street, they made
sense."

"The run flats on Vipers aren't called run-craps for nothing. My
grandma on a 10-speed bike has better traction off the line than these
tires give on a performance car. Their only positive quality is that
they last a long time, but that just means that you have dangerously
bad tires for a long time. I'm changing to PS2 or PSCups."

"As with the front tires on my Viper there isnt much choice in what
tires to get. This is my third set of PS2s for the 19 in rear wheels
of my Viper, and these are excellent tires unless you get onto snow or
ice...then you go nowhere at all. Not surprising. Tread life was
14,000 miles for the first set, the second set went over 16,000. About
what one expects based on the experience of other Viper owners."

If your happy that's what counts, not what other people think.