In 2006 I paid 636 at Don Davis Honda for a timing belt, water pump, valve clearance adjustment, new valve cover gasket, and engine detail. Your quote isn’t that much different than what i had done. My work was done on a 1998 honda civic hx. I think some of the people would agree with me that this is one job that should be done by the dealer due to their expertise but everyone is different. I live in WNY and would check out total automotive and stu’s automotive as slternatives. hope this helps, Steve.