How about michelin xm2?is it considered quiet tyre?

Yes but it's Michelin low end model, not worth it!

Ok

its acceptable when new, but its not that quiet. it is more famous for high mileage. So it is more harder. wont be that quiet as time goes by.

I'm using Continental CC6 and Michelin XM2 in both my cars used for daily rides.
Both are entry level tyres, not high end nor performance tyres.

My reviews on both these are :
1) Continental CC6 have significant better noise reductions compared to Michelin XM2.
2) When on uneven roads, Michelin XM2 harder side walls will give you more vibrations and shakes on ride.
3) In terms of grips, both are acceptional and are actually much more better than what people thought an entry level tyre could be. Unless you're a high rev speeder, and high speed corner takers, then these tyres wont be suitable. XM2 gives better grips in wet condition, but the CC6 are not much left behind though. Both are designed for daily commuting, hence i'll say the grips are good for driving below 120kmh.
4) Price wise, for the same size tyre, XM2 will be higher by 10-20% compared to CC6.