Thanks to everyone that responded to my query regarding the Michelin Tires. Decided to get them as replacements after all.
Michelin is getting it !!!!!
The warranty is now as follows.......30 day return if you don't like them, 3 year free flat fix and towing for 150 miles, and a 6 year warranty plus a 50000 mile treadwear ( with rotation )
I bought them at Costco, where they will check tirepressure free every month and do the rotation on a recommended schedule. Since I don't drive all that much anymore they should last me a long time. They are a great fit for the Lexus RX350, very smooth and practically noiseless. ( the Bridgestones are loud ! ) Total price out the door was $882.00 for a set of 4 Energy MXV4 for 18" wheels