Psycho, a water setup for an i7 starts at $225 minimum. What if he doesn't want to spend that? Give him options, many many run i7 with good aftermarket air cooler.
Unless you run a WC setup, how can you recommend one? Your not running a WC setup, your running the coolit, a cute little oddity in the cooling world.
70 pump
70 CPU block
60 rad
25 hose clamps etc.