Seconding Chrisicool's contribution.
also, i would like to add, that size isnt that relevant. I mean, i prefer pipes that are a little on the larger size. If you want the best hookah go with something like a Nour, KM, or MZ. All of these are hand crafted, pretty solid construction and aesthetically pleasing. I prefer these to something like a MYA or a Sahara hookah becasue they are made with a little better materials and have a TRADITIONAL CHAMBER as opposed to a COMMON CHAMBER. They also tend to smoke a littl ebetter, in that the draw on them is much looser than that of most other hookahs.
I would also like to add, that just because you smoke with more than one person doesnt mean you should get a 2+ hose hookah, there is nothign wrong with passing the hose. IN my experience, two hose rigs, especially those with autoseal systems are just too much of a hassle. If you insist on getting a two hose, i reccomend a KM two hose from **********.com. TheHookah.com sells them as well, but i have a man-crush on John. Teehee
These of course are just my opinions, feel free to do with them as you please.