Sorry if this should be in buying advice. I think the chaps in here will be more knowledgable. Anyway. Im planning to buy a power mac G5 for amature photography, retro gaming and maybe some creative writing. (got my gaming pc for all the other) What I need to know is what was the most powerful model that was air cooled? I don't want to struggle with water coolers. And what should I look to pay for it?