Shingle roof change cost?

Insurance sent me letter if I don't change it, they won't renew my insurance. 

Allstate has been treating me well with a few claims (at different houses), Claims not roof related. 

1800 sqft house. 

Owens Corning Oakridge Shingles Desert Tan

39.7 sq

 

50 Year Manufacturer Warranty

2 Year Workmanship Warranty

 

$13850. 

is this brand/quote too expensive? Northwest region.