Aksium's are good, but they are on the heavy side. If you watch the online stores you can get a set of Equips on sale for not much more. If you really have some patience, I bought my last set of SSCs off Craigslist with wheel bags for $350.

Of course, the 41 crowd will tell you you need a set of custom (fill in the boutique builder) wheels made out of unobtanium that will cost more than your next BMW.