Hi, we are new to the mac world so please excuse us. here is our story.me and my friend just got into short films.we are in the process of writing out first short film which will be about 20-30 minutes long. we are both PC owners and at the moment none of our Pc are good for video editing.we have shot some clips with our Canon T3I DSLR and tried to edit them on Sony Vegas but its a real lag to even preview the clips. we recently made the decision to buy a mac.The only bad thing is we only have a Budget of $500. we would like to buy a mac machine which would allow us to edit on lets say FCP. we have been searching on ebay and we see some machines under 500 with specs like : Apple Power Macintosh G5 DUAL 2Ghz 4GB RAM 80GB HARD DRIVE RUNNING LEOPARD 10.5.8 WITH ILIFE '09!!!!! (DE001505) OUR main questions are. what would you recommend to us with the budget limitations that we have ? what would be the ideal specs and machine you would recommend ? and what are the main things to look for and look out for when buying an mac for our mail purpose which is short film editing.