http://forum.square-enix.com/ffxiv/t...king-gear-sets

Old post but it'll give you the jist. That link provides some good PVE-for-frontline examples.

It depends on what PVE gear you have, ilvl aside. Look at the secondary stats. Compare your PVE secondary stats to the i90 equivelent. If your pve gear has next to useless secondaries like parry, accuracy, speed, pvp item would be better.