whtever you do dont' "settle" for cheap wheels, you will regret it and your car will look like ass imo.
Id rather polish the factory wheels, or have am powercoated or something the spend a dime on some cheap stuff that looks cheap.
you can get used porsche wheels lots of places, check out ebay for about 20 pages of porsche wheels for sale, if you do it right you can get em pretty damn cheap. 300 hundred or so on adapters, buy some tires and you are set..
if you need to save up, it's winter now anyway, you have months to come up with some cool wheels.