Depends on what your are willing to spend and what your expectations are(and money does not alway equate to reliability)? For everyone it is different. How many days you spend on the water, how you sail the boat, conditions you sail, how you store the boat, even how you trailer the boat. And what you expect to not have to replace. Even the tornado guys replace things like beams, tramps, rigging, etc. If you want a tank the buy a tank. If you want a sports car then buy a sport car and understand it is a sports car. If you expect something to last for a set time better put it under glass and never use it because Sh*t Happens. And when it does you fix it.