Two factors:
-If you are a hard rider any of these forks will need regular servicing.
-If you ride in slop regularly any of these will benefit from regular servicing.
No new mountain bike fork is bombproof. Take your chances with Mazz but they arent cheap now are they? Old rope for new technology prices.
Personally I'd buy a pair of Pikes from Winstanleys with the 2yr year warranty backup. I have had a couple of issues with Pikes but I'd rather give them my money than Marzocchi.
Just clean the stanchions by hand (not jetwash) after every ride and cycle them. You'll be fine.
If you ride through gritty slop that cakes around your stanchions then yes- its reasonable to expect they'll wear down overtime if your not removing this grit thoroughly and carefully.