i don't think location matters. those tubes are very durable, and don't "just break" that easily. if they did, corsair wouldn't give a 5 yr warranty with them. besides, afaik, the coolant in those are non conductive meaning even if they did leak, it wouldnt matter.
If i were to get a liquid cooler, cooler master's seidon series are cheaper than corsair's and in review perform better on some tests. are the seidon any good?