If you buy the H70 or H80 replace the stock fans with something better. They're fucking noisy; at least for my taste. You can find 120mm fans that push more and are quieter at the same time.
Pretty much this. They're very low profile and there is almost no weight put onto your motherboard as the heat sink attaches to the back of the case.
or you could just buy an air cooler like the D14 that gets similar/better performance without you needing to sink even more money just to get decent quiet fans
the only time I would consider an all in one loop is when building a portable system, otherwise weight isn't an issue
Edited:
plus a 212+/212 evo is enough for most people