The Riva 510 from Liberty Flights is a FABULOUS first choice!
Don't forget in the upper left hand corner of their website is a little button that says 20% off. Click that BEFORE shopping/putting things in your cart (it won't give you the discount if you push the button after). I WASTED so much money in the beginning buying inferior e-cig's, then about one or two weeks in I found out about the Joye Ego/Riva 510/all the other clones, and really wished that I had done my home work before spending several hundred on PV'S that only had a battery last for an hour at most.
You will LOVE the Riva, it gets 8-10 hours out of a single charge, and the kits come with two batteries, and Liberty Flights is selling it for $29.99 after you push that little button! That my friend is the best deal on the net.
I ended up buying a T-Rex (the same thing, a Joye Ego clone) from esmokeronline.com, spent the same thirty dollars, and absolutely fell in love with it within the first week, my next purchase was a Joye Ego Tank atomizer/cartridges I got those from liberty flights. It was $22 shipped. I live in South Carolina, and they ship from California, so it wasn't a next day thing. I received my order 5 business days after I placed it, but had NO PROBLEMS at all with the company, and fell in love with the Tank atty that I ordered, and so did my wife, so much in fact that I ordered TWO Joye Ego-T kits from iVape.net (he's got a great sale on those now $59.99 compared to most peoples $70+) the only thing I might recommend on your first order, is some different ranges of nicotine. My first juice order, was ALL at 16 MG, and it wasn't cutting it, I was still jonsing for a smoke, it wasn't satisfying me, my next order was for 24, and that was just right for me, however since then I also ordered 5 bottles at 36MG, for those times that I'm REALLY stressed, and want a smoke. So I can in a day go from 16mg all the way up to 36. It is ALWAYS good to have options, especially when you can't just walk into a store and buy this stuff, but you can do that with smokes.
Two more suggestions, you might want to order at least one bottle made up of PG, or at least a mix of PG/VG, the PG will make the vapor FEEL moor like smoke, that and it is SO hard to get the straight VG to soak into the pollyfill that is in the carts, it can be as thick as honey at times, that is unless you know you have some sort of allergy to PG that is.
My other suggestion would be to get at least one 30ML bottle of SOMETHING, I almost ran out when I first started vaping, and I didn't want to start smoking at all. In the beginning you won't be able to taste any of the vapes except for menthol, most smokers taste buds are shot, I ended up buying "camel" juice from my first vendor. It was actually called Desert Ship when it arrived. Three weeks later, and I just ordered 240ml of it yesterday, I LOVE the taste. It actually tastes like a pack of camels SMELLS like when you first open it, kinda nutty, earthy, tobaccoey.......
Everyone is different, but these things worked for me.
Me I was a 3-5 pack a day smoker, I'm 39, and had been smoking since I was 13. These things, when done right are absolutely amazing. I don't want to smoke! I never in my life thought I would be able to say that, but the thought of that disgusting thing.....yuck! I love vaping, all these new tastes......and it FEELS like I'm still smoking, but my health is so much better.
I ramble, sorry about that, but good luck! And you will absolutely LOVE your Riva from Liberty Flights.