At first it is more expensive, or can be.
you have a nice unit, the provari mini, stick with it. No hardware in that class is going to make your vaping better.
different tanks/coil type will drastically change the flavor and vapor.
i highly recommend you avoid any and all protank 1 or 2's
i can't speak for the 3's or new unit they have but I settled on the Aspire BDC type and aside from a rebuild able it's the best flavor and experience thus far.
dont go all crazy buying mods and such as they won't get you anything other than bling.
Play with different tank/coil types but stick with the provari and you will find things are cheaper but not by much.
juice will also drain your bank if you are trying a lot of them.
i urge you and anyone to get sample kits when ever possible.
i would start with GoodLifeVapor.com as they have tons of really good quality juices ranging from fruity to exotic
spook sauce and high 5 are my favorites.
oh and I'm 42 and was smoking for almost 30yrs
they truly taste like turpentine now and I hate them, though crave them everyday.
vaping just isn't the same but I have accepted that and won't start smoking again
I been smoke free for 11 months
stick with it, it's hard and keeps being hard, but your body will thank you for it.
kind of a funny side note (no pun intended by what I am gunna say) but before vaping when I would have a good hard laugh I would cough, now... Nope, not even a glimmer of a cough when I have a good hearty laugh.
that to me is one of the biggest joys as it was embarrassing to me to laugh hard at something and end up coughing in the end because of my lungs.
lastly I am a life long migraine sufferer, had them since I was little, and since I started vaping I don't get them but a fraction of the time now. Smoking is soooo bad for people with migraines so if anything, switch to stop the headaches.