Sword vs Axe

Well I finally merched a bit and got some 2 bil mesos for me to spend. At the moment, the main question I've been debating is whether I go 1h sword + shield or go with an axe. My current Reverse Nibleheim is 166ish attack with the potential and nebulite (if you're wondering why so high, pre-big bang and GM scrolls 5/7) and I think I heard there was an upcoming NX item that can make untradable items into tradable status. Nonetheless, my friends and guildmates always tease me how I should get a better sword and they even found 2h axe which were around 150ish attack but I remembered something about axes being slower but more base attack. However, there must be a reason why axes are cheaper (maybe because they're less used in job varieties?)

Anyways, the main question is "should I stick with my Reverse Nibleheim or switch onto an axe(2h/1h) or a 1h sword with shield?"