Question about the iMac/MacBook and how it runs

Hi, all

I'm a devoted windows user, but I'm going to get a Mac this august. I'm just seeing if I can do a few things on the lowest costing iMac.

1. Can I run WoW well?

2. Do I need Virus/Firewall protection?

3. Should I get one or get a Macbook?

4. Can the Macbook run WoW alright?

Thanks for helping a Mac Newb.

If you like your desktop pcs, get a iMac!

WoW is an old game, it'll run fine.