Home page: http://aljitech.com/ or Arcade: http://aljitech.com/forums/arcade.php Both of them have a 5/10 PR.
its hard to decide... Create identical ads for both. Check after 1 month and stay with the one that converts% better.
PR doesn't matter for adwords landing pages unless you're worried about people with goog toolbar thinking you're a questionable new site landing page should be different for every adgroup
What do you want to accomplish on this PPC campaign? Game Play? Branding? Adsense Revenue? Do you even know? I'ts funny that I don't know much about adwords compared to these "professionals" but I know the basics?