I am looking to buy an 06 4.2 and have been trying to research any problems that were present in the 05 but fixed in the 06. Does anyone have any input on:

1.) Recommendations of either the 3.2 or 4.2 as the motor to go with and why.
2.) Problems to watch out for in the 06 model year (other than rear brakes which I have read about)
3.) Does the original 4 year 50K mile warranty cover all scheduled maintenance up until the expiration of the warranty if I buy a CPO from a dealership?
4.) Other than the aesthetics of the bumpers on the S-line, is there a noticeable difference in the ride/height of the s-line vs. non s-line given the sport suspension claim?

I appreciate your input on these items. I have gone through the pages of topics, but have not found clear answers to these items.

Thanks.