FoW Armor or Zaishen Supporter?

I'd go for the obby armour.....complete FoW while you're there and you'll get the Conqueror of FoW statue as well. The keys for the zaishen title can be obtained easily if you look out for the pvp weekends and use the zaishen combat bonuses.

if you are going for 50/50, go buy fow or keep your money especially if you are short atm, you will need some cash to be able to make good deals on pets when there are some.

You will have time to choose another pvp title, and who knows, they might add pvp titles.

If you are unsure about going/having time to 50/50, start buying the other required armors/hero armos/wepons/pets.

Get obby.

Go to RA on zquest day and do the quest 2-3 times and you'll have plenty of keys soon enough.

Speaking for myself, I'd prefer to complete my mesmer's Obsidian armor - I already have one item (the footwear) so it'd only take 90 ectos/obsidian shards plus Elonian leather squares (which I can craft) and cloth to round out. I have some things to sell (at least one Oppressor weapon with more coming soon, Rin relics, Diessa chalices and superb Charr carvings) that should get me to the number of ectos I require and some more obsidian shards (currently have 66 ectos and 12 obby shards in storage). I have nearly 2,000 platinum in cash reserves so money isn't going to be a problem (at current prices I figure I could buy the obby shards I need for less than 320k). I'm at 35/50 and not really that interested in getting to 50/50; Obsidian armor is the last thing I need to fill out my Resilience score.