watercooling has its ups and downs - the trade offs are that in watercooling you'll have a quieter work space and with neons - make the case look really awesome with UV die in your waterloops. You get better temps and stability. The hassle is that they need maintenance and to set them up takes a weeeeeeeee bit of patience as a leaky hose connection might ruin your dream rig.
Aircooling is good because its cheaper and they are relatively lower in maintenance (apart from *the cleaning the dirt with a brush* part)
if you can afford it - go ahead - if not then dont look into the cheap spectrum for watercooling - a GOOD setup will cost you $450-500