ProVaris are awesome, but some people in this thread are really hyping them up. They are not the best thing ever to happen to vaping.
However, now you know the pros and cons of both. (The pros of the ProVari a little bit more)
While subohm vaping seems to be highly frowned upon in the ECF community, I guarantee you that you will want to try it eventually. Pick up a Sony or MNKE battery with a high amp limit and you're good to go. MNKE 650 batteries can handle up to 20amps, some Sonys up to 30. This will handle basically anything you throw at them (provided you play it safe, like knowing when to change them out, how to avoid a short, etc)
I do agree that the ProVari is probably the best PV, but I'll always prefer a good ol' mech/rda. If I were you, I'd get 2 or 3 of the batteries I mentioned along with an rda that is easy to dual coil. Build a 2/3 wrap with 28guage and you'll be at about .3ohms. Drill the holes out to match your preference for taste/TH/vapor generation. Yeah, .3ohms is really low, but it generates about 14 amps which is well under the MNKEs amp cap.
Let me reiterate that you should only do this provided you know the warning signs of a battery about to vent (even though MNKEs are considered safe-chemistry, they are not immune) and when to change out your battery.
To me the whole PV vs. mech argument sounds a lot like Mac vs. PC. PVs (like Macs) are user-friendly with their displays and difficult for the average person to break. This is because the dna chip is there to ensure an ohm limit and protect the battery. Mechs, however, offer complete control over the mechanics of a vape to the "advanced" user (similar to PCs). Sure, there are some more issues down the line if you don't know what you're doing. But as long as you do, you have complete freedom to build how you want.
All that being said, PVs are definitely better for cartos/clearos because you are able to set the voltage higher and deliver a constant voltage, whereas mechs are limited in that respect to the capabilities of the battery alone. This is an obvious benefit of PVs because most cartos/clearos you buy have a relatively high resistance.
Not trying to diss the ProVari, I agree its a great PV. Just saying that the ProVari isn't flawless and there are benfits to mech mods. I didn't even mention mech mod internals and the customization involved there.