Depends on whether you're talking e90 or e92. If you like the facelift coming out for the e90 then wait a lil bit. If not, then you better hurry up and place an order soon. You don't have to worry about the e92 refresh for a good while. No reason to wait.
E92 335i: Space Grey|Coral Red|Aluminum Trim
Future Ride: 2015 Mustang GT Premium |Guard|401A|PP|Recaros|6MT