which one is the best to buy?
Clay... I had the same problem. They ALL looked so good! I ended up purchasing the MGX (because I'm a newbie and this looked like a great beginner's tool), and I also bought the Helix -Syn. Haven't received them yet, and the anticipation is nearly killing me!
Good Luck!
I would say middle of the road helix or helix syn.I have never tried a progasm but started with classic helix and now have a eupho.
Clay562, you don't say what is the smallest. I guess it is the SGX. The MGX is the same profile but a little bigger. If you have been very happy with the SGX then the MGX may work well. The MGX is quite an old model but there have been a number of posts recently saying it is still good. If you want something different go with braveneworld's suggestion.