I’m really not a fan of the standard wheels, so I debated long and hard over CSLs vs M3 19s. I loooove that pic above of the silver grey MC with the M3 19s... In the end I was just slightly preferring the M3 19s and so what with the cost difference it made sense to go with the M3s, especially as the set I bought were up for a bargain. For a month or two after I was still sniffing around a used set of CSLs as I just wanted to compare both sets. I had a price agreed with one guy only for him to sell them to someone else without telling me...
I’m happy with the M3s though and my CSL lustings have faded, although they’re still a fantastic wheel. I know some people say CSLs are done to death, but how often do Z4M drivers see another Z4M with CSLs in real life? I’ve never seen one but I hardly ever see a Z4M coupe or roadster full stop!
Only thing to watch on CSLs is that they’re genuine and not buckled. They’re softer than the M3 19s and I have known of some of them being buckled. On the M3 19s preferably look for a set that have never been refurbed (still have a dull mirror finish, not a grooved diamond cut finish. In pictures look to see the depth of the indent that holds the M badge (thinner depth means metal has been machined away), and whether the longer dark painted lines on the front are solid the whole way: if the wheels have been diamond cut too many times the longer painted lines will be broken just before the reach the hole towards the centre of the wheel.
My wheels will eventually be going to National Alloys in Widnes for a refurb (bought them with some milking) and they are the only guys I now that polish and lacquer them rather than diamond cutting/lacquering them.