Stuck

I want to spend as lil money as possible but i want a wicked gun. A5=too slow. Anyways, ive heard good things about all guns (im a noob so plz answer my questions) im hearing more good things about ion and not so many people are talking about promaster or wrath. I want to upgrade and get nice ropes of paint, i like Light gun. Im planning on buying Compressed Air tank (good idea or bad?)
My plan:
New gun + upgrades
Halo B Clear Hopper
New Tank

Anyone that can suggest a gun (with price ((plz state currency us or can)) thnx) upgrades what kind of tank (nitro? or compressed air?)

I saw in another post, predator board for ion, what is a board? and a feed neck?
Help a noobie!!