Hey Mister G - this might be a little late. I get the feeling you may have already pulled the trigger. I saw your message on the Versa forum about cheaper models being found on e-bay. I have been doing a bit of research as well and found the e-bay prices were probably better than the Chinese sites and the choices seem better as well.
I'm certainly not even close to being an expert as I only picked up my own hookah pipe 6 days ago. However, I have been doing some research. I chose mine fairly quickly and did not put much thought in to it. I'm now planning on upgrading already. I really dislike my whip. It is cheap stainless steel at one end and crappy wood on the other. God only knows what the tubing is made of. It functions well but I don't think it will be pleasing to me in the long-term.
I have been doing some research on hookahs and have found that there are some beautiful high end glass models available. They are not cheap but they are beautiful. I have found some of the top brands include Roi, LaVoo, Fumo, Evolution and Lust. Many people seem to think Roi is a good brand. The products seems to include ground glass on glass connections and the mouth-tip is also glass. I am close to pulling the trigger on this bad boy from Roi;
http://www.hookah-shisha.com/p-16008-roi-ufo-beast.html
or possibly this one from LaVoo;
http://www.hookah-shisha.com/p-14166-Lavoo-hookah-mp6-1hose-glass-hookah.html
My biggest concern is whether or not Versa's hookah attachment will fit. It would be a very expensive mistake to make.
Last night I had a couple of nice bowls with my bubbler. Very nice. Switched to the hookah and found that .2 really gave me quite a long relaxing session. It was a nice mix of sipping, smaller hits and a few giant hits.
I am thinking a beautiful glass hookah is going to make the Infinity a great session vape.