OP: Save up and buy the newest S for which you can
pay cash. I do not recommend financing a used Porsche. The payment money will be needed for potential repairs and maintenance (rubber alone may need replacing annually if you use the car as a daily driver. The rear tires just don't last more than 12k and will run you $175 - $500 each). Plus, the older the car model, the more cheap and poorly made plastic parts it has on it that fall apart due to age or heat, even if the car has very few miles on it.
Info on the model range: The 03's and up had a rear glass window that is MUCH better than a plastic rear window one should manually fold during the closing operation (a pain in the a$$). The 07's and up have a redesigned interior that's much nicer. The mid 2009's got a new motor that is better than the previous one and doesn't have an intermediate shaft bearing that sometimes fails in our cars and it has the supposedly wonderful new automatic transmission in it if you want an auto-shifter.
.... and as a personal favor for me and the other readers here, and for the basic respect of the written word ... please capitalize the first words in your sentences. It makes your posts easier to read and I will personally guarantee that it will increase your income potential in years to come. Really.