I've been vaping for a few years, now, since NY increased taxes on them so much. Badcat also vapes, if you want to drop him a PM and get his take. Everyone's got an opinion, and a strong one at that! So, it's always hard to wade through. But first, this is the website I always use now.
http://www.valuevapor.com The prices are the best, and the shipping is fast! They must live next door to the post office. As soon as you hit enter, it seems they bag it up and send it out right then.
I use the Ego Joye, and have for some time now. I couldn't get the Blu to work as a viable substitute.

At the value vapor site, starter kits run from $40 to $45. The little vials of liquid (which add the flavor and the nicotine) are about $5, and last 3 weeks or so. The atomizers (one of the components, that turns the liquid into vapor) needs replacing about once a month, and those are also about $5. The top end piece, the tip that you suck in on, is called a cartridge. This is what you drip about 7 drops of liquid into (into a stuffing like material). These last for about a month, I think, and cost 50 cents. So, once you have all the equipment, it's super cheap.
I was able to cut cig smoking in half. About 40 hours is how long I can make a pack last, using the vaporing as a substitute. If I had more willpower, I could improve those numbers, and many people substitute completely.
http://www.e-cigarette-forum.com/forum/There is a forum I've frequented, while trying to wade through. The new members forum is good for encouragement and add'l info.