Well Osbornsm,
If you drive your car like a race/drag car, like many on this forum do, maybe investing in a long term Nissan backed warranty (before your factory expires) wouldn't be a bad idea? I wouldn't use any of those 2nd/3rd party warranties but based on the posts I've seen here, a Nissan backed extended warranty is nice when "My 2nd to 3rd shift at 7000 just started grinding" etc.... requires a new transmission/driveline out of warranty.