There is nothing wrong with a good aftermarket wheel if you understand that you may have to add a hubcentric ring to prevent hubcentric vibrations. The Miata community has been using hubcentric rings for the past 17 years with their aftermarket wheels with no problems (I own two Miatas so I know all about this).
What you need to do is find out the center bore of your wheels that you like and then get some hubcentric rings from a place like I posted up in Post #9 and you will be all set.
I personally stuck with a BBS wheel made specifically for our Toyotas (106 mm center bore), but if I would have found a nice aftermarket wheel that I liked better than the ones I bought, I would have used the hubcentric rings that I had purchased just for this reason. I ended up selling them to another person at work because he did have aftermarket wheels that were vibrating so much that it "destroyed" his front two tires before he found out what it took to correct his vibration problem.