on the cheap and best vaporizer don't seem to go well together. in contrast a good cheap bong will get you ripped just like a good quality bong will too but it seems vaporizers are like a fine instrument. still it seems only one will not do. I have a myrtle zap and it (as well as the PD) is great for very efficient use but wont get thick hits. going from smoking to this "new thing" called vaporization is really a whole different mind set. it is really hard to describe.
for me in how I like to explain it is in eating. there is times when you eat when you are hungry and you gulp it down and dont taste much. but vaporizing in one of these fine instruments is much like a gourmet meal, you have things that taste well together and compliment each other, you really get to enjoy it.
I would say the PD would be great way to start enjoying it. the chinese ebay box really gives it a bad start. I stuck with it myself and i am glad I did. it will cost you but the PD is easy as pie. you fill it and puff it. granted there are further refinements you can do but it is a consistent method. from there many people sem to start collecting them and using them for different ways. i kind of want a silver surfer now, but now I have my brother to share in it to (party style) i like the MZ for personal "sipping" and I simply must have a vapor genie to reuse the ABV
but I think once you get it down as far as a technique goes, it really is a completely new way to enjoy it
i have noticed that many on here have about three on average to use, and people stand by them. i think the best start would be to read up on each one of them in the forums. the PD does have a good following and that means many people to share and learn the many tips you can use to get the most out of it. think it becomes a hobby then to many. but getting a PD and it wil pay for itself in a good bit on the money saved on weed.
much more reading is needed to get what you want and chances are when you think the PD is the way to go and have one for a few months, you very well will want something else for a different style. I do think that once you get into vaping more then wanting to smoke it really loses its appeal for many
bottom line the best will still be personal choice and style, it certainly gets high marks all around