Whoa, didn't know there were that many hookah afficionados here.
Anyways, I just wanted to bpoint out that if you think douvle apple is great, you haven't tried that many flavors yet. I personally thought it was the worst because it made me feel way too light-headed.
Mixing is "teh win". I just tried a mix of rose and mint flavors with some ice in the water bowl, and it was probably the best "mashup" ever.
The key too a smooth smoke is not a cold water, though that is secondary. Primarily you have to get the right size of coal onto the top. If you've got this round easy light types, you should break them in quarters, and then try putting three quarters on it.
Hookahs (or shisha's as they're also know as) themselves are pretty cheap. It's probably not more than 50 USD for the bag, in which you get the shisha itself, a pipe to smoke with, and a cleaning brush. The flavors cost around 15 USD/500 grams, IIRC.
Any other questions?
(C)