I don't think anyone has ever gone wrong with a ProVari V2. I said in a VMax thread once (I own three VMax's) that if I were going to be stranded on a desert island (with a convenient 110-volt outlet) I'd want a Provari with me. And lots of juice and cartos, of course.
I do like the VMax very much, of course. "Stacked" IMR batteries do not concern me in the least due to their chemistry. I like its performance, its menu system, its price (between $100 bare-bones and $128.95 incluing two AW IMR 18350 batteries from All About Vapor), and its looks, to which it owes immeasurable gratitude to ProVape.
I have heard great things about the Buzz Pro 2, which now comes in an "ECF compliant" version that has cool lightning-bolt-shaped vents in its case. I hear that they're very rugged and work very well.
I like Sailorman's suggestion about the Apollo VV tube, which from what I have read is an APV that has the best of what the Lavatube family has to offer, with the fewest of the "weak links" that are sometimes attributed to that family, like plastic end caps and sub-par switches (if memory serves me correctly on the latter).
I really like the Joyetech Twist. Used with Smoktech 3.5ml DCT tanks fitted with properly punched or slotted Boge 2.0 ohm single coil XL stainless steel cartomizers, I think it's a great addition to just about anyone's collection of PV's.
kGo batteries give legendary performance for what they are; fixed-voltage 3.7 volt batteries, now with PWM (pulse width modulation) as I understand it. Fitted with just the right resistance coil, they will give a fine, non-adjustable vape.
I used to be a big fan of e-Powers, and I'll still fire one up on occasion. They're fine for what they offer; a dependable fixed-voltage device with replaceable battery and replaceable switch. But again, a non-adjustable vape. No ability to dial the power upor down to give an optimum vape for a variety of conditions like particular flavor of juice, PG/VG ratio, rate of juice delivery to the coil or coils, or mood/whim of the user.
I've had my Joyetech tank atomizers loaned out all over the place for so long that I can scarcely remember how well they worked. Pretty well as I recall (the "T" style, that is); and the one day or so that I actually possessed a "C" style Joyetech atomizer with "B" tanks, it seemed to work pretty well until I loaned it out to my friend Jim B. When I get it back I can exeriment with it some more. The Joyetch atomizers can be finicky, but I have yet to scratch the surface of how to improve their function by simple things like adjusting or modifying the wick. The people at Bulli Smoker seem to think quite a lot of the Joyetch tanks, having designed at least two variants of their legendary "Bulli" atomizer around them; both a "A" and "B" style. I am very much looking forward to owning a Bulli A2-TM, made for the Joyetech "B" tank. It is one of several rebuildable atomizers on the market which allow the user to make his own coils of varying resistances, as well as his own wicks with varying juice-carrying characteristics for optimal performance with a wide variety of juices.
Speaking of the Bulli atomizer, it brings to mind my opinion that the best vape can be had on a single coil warmed to the optimal temperaure and in optimal contact with the juice. IMO a single coil will provide plenty of vapor, and will extend battery life over dual coils for obvious scientific reasons.
For a ciggie look-alike, I'd go with a Volt. I have no first-hand experience with them yet, but I've heard enough to convince me that that is what I would get in a heartbeat. The PCC (personal charging case) alone is IMO worth the price of admission. The Volt is said to perform just great and be very reliable.
In conclusion: (wild cheers) .... if you get either the ProVari or the Lavatube, I would also get a couple of Twists for out and about, set up exactly like Grimm Green has his set up in his review of that device.
THE EGO TWIST IS A GAME CHANGER - YouTube Grimm Green Twist Game changer
I would then slot the Bog cartos exactly like Phil Busardo does in this YouTube video
A PBusardo Tutorial - How I slot my cartos!.wmv - YouTube pbusardo slotting cartos
I would then enjoy a great vape with either my ProVari, Lavatube, or Twist(s).
YMMV of course. Happy vaping, whatever it's on.