As has been said, this is a highly subjective topic. There are some PVs that are generally accepted as being high end, reliable, great performers, etc. Devices like the Provari and Darwin fit that bill, but they're also quite expensive. There are less expensive devices like the VMax or eGo-C Twist, which are also quite good though perhaps not as sturdy. And the PV is only really half the equation. There are also cartomizers and clearomizers to consider, which will also tend to get you a fairly wide response to what's best. Cartomizers in particular are sort of hard to gauge because the two biggest cartomizer manufacturers have been having a lot of difficulty this year maintaining quality levels so a lot of us have been going with other brands.
For starting out, what I'd recommend is something like a couple of eGo-C Twist batteries and an eGo charger or two as the base. This will give you a good, relatively slim battery that can handle true variable voltage to allow you to tailor your experience to a respectable degree at an extremely reasonable price. As for what to attach to it, I would start off either with some Boge cartomizers -- standard or low resistance will do fine because you can adjust the voltage either way to suit your tastes -- or a Stardust 2 clearomizer and a few spare heads. The cartomizers are easier to deal with because you just fill and go, refill when needed, and replace when they're no longer performing to your needs. Stardust 2 clearomizers are easier to refill but require you to keep in mind that they need to be tipped on end periodically to make sure sufficient E-liquid is getting to the top of the wicks. Outside of that though they're pretty easy to deal with as well, and are quicker to fill. Plus you can see your juice levels.
With this sort of setup you could get going with a pair of batteries, charger, and a few cartomizers or clearomizers for around $60-80. Then you just need to get some E-liquid -- and if nothing else, you won't find a wider range of subjective opinions than what the "best" juice is, because everyone's tastes are different.