Stardusts are great, and highly recommended. They are out of stock right now, but according to GV should be back in a couple of weeks. Many (maybe most) folks are crazy about them (myself included), so we are all waiting around with credit cards at the ready. But no worries, apparently there will be "tons".
The entire Visions Extreme line is also wonderful. From Nano to Grande, it's reliable, fiddle-free, and an all-around great carto. The only one I haven't tried is Giant.
Both Stardusts and Visions work right out of the box for most people. Of course, if you are
vaping straight VG, you might have to adjust them a tad. Sometimes. I vape mostly VG, and mostly fiddle-free with these.
Fluxos are very good, but you do have to mod them to get the most out of them. They are very reliable, and they never leak or crack, or any such thing. They also are easy to take apart without any bad consequences, and are therefore very easy to clean. The mod is not complicated, so if you don't mind a little fiddle, these are good reliable critters.
If you like
tank-sized stuff, and don't like fillers, there are two choices: Visions Grande, and the Stone. The Grande, as I mentioned above, is very easy to love: it has four wicks and so is a wicking beast, it tastes great, and it's easy to deal with. The Stone I am not as familiar with. There is a thread on them you might want to look at. I'm happy with the Grande right now.
Of the entire line-up, I'd recommend Stardusts and Visions Extreme, with Fluxos close behind. All three are good. Some folks prefer Fluxos to Visions, it's really a matter of taste, you have to try them. There is a certain amount of almost "mystic" quality about this: some folks mystically get along with some products, and some seem to have irreconcilable differences, albeit such phenomena seem to be only a small percentage of usage. But you never know.
If I was just starting out with GV, I'd get two of each (two, because there is always a possibility, however unlikely, that you'll get a rare dud): Stardusts and Visions Extreme Regular, and a box of Fluxos. Then see which works best for you.
Hope this helps.