Unless you go with an NZXT Kraken X60, you will hardly have any cooling performance improvements with a CLC. Plus, the CLC will be noisier.
If you really need side-panel fans, you wouldn't want the GX700 or the 302. The Enermax Coenus doesn't have fan mounts on its side panel.
Your best bet would be to go with the CoolerMaster HAF 912. It has a side panel fan mount and it should have the clearance required for your cooler.