The side fan works for intake, so, the 1st options isn't good idea IMO. You can go with the NH-D14, Thermalright Silver Arrow, Thermalright Archon or Thermalright Venomous X, all those are very good coolers.
I want to know the answer to this as well. I have the same case and a p8z68 mobo. I want liquid but don't know the best choice? I have read that there could be mounting issues. Looking at Corsiar H80 and H100.