That you're asking means you don't want phase. However,
Phase is a lot louder, for the obvious reason of having a compressor running. It isn't a fridge, though air con units can be adapted, since the fridge can't cope with a large sustained heatload. This is why we don't cool computers with fridges. Generally they are made by people at home, or you pay someone to do this for you. I think costs come out around £800 or so for a unit, but that's a very crude estimate.
It will do bad things to your electricity bill, but if you're willing to spend the best part of a grand on one this probably doesn't matter. The other option is peltiers, which I think is a much nicer idea, and cheaper, but is again generally self assembled and will absolutely ruin your electricity bill.
The best in terms of degrees is phase. The best in terms of practicality, cost, noise, almost everything else really is water. Air is louder and hotter but cheaper. Above ambient (well, dew point) is wise as it avoids condensation issues