Either way they are both options on the table but don't expect any thing higher performance wise unless you found a large enough cooler while still having decent air flow with in the case to keep it cool enough. You can always pick up something higher end like a GTX 460 or a cheap 5850 and then call around a few companies to make a custom block but that wont be cheap that could cool the card but who would do that? If air won't do then go water.