You'll soon be able to transmog your gear in Assassin's Creed Odyssey, which, if you're not a World of Warcraft fan, means you'll be able to set your appearance separately to the items you're actually wearing.
Odyssey has some snazzy-looking armour and weapons, though you have to replace them fairly quickly as you acquire higher level but more common-looking bits and pieces. You can pay to upgrade your armour at Blacksmiths, but it's simpler to just keep equipping newer items instead.
The feature arrives in the game later this month, and then you'll never have to choose between that lovely looking helmet and something that actually raises your power.