Rule of thumb, get armor that is on your optimal level.
Yes you need armor for each class, but if you have limited gil atm, consider gear that usable by all class
What best for you?back again,anything that in your optimal and affordable.

for the site Im not sure, because with recent patch,all database/fansite updating theirs. you can try look on ffxivpro ,yg.ffxiv.com,or ffxiv zam (google it)

hope that helps...and, try gathering/crafting..it helps you make money