My advice is to take your time researching here on the forum. Visit the individual sub-forums for each mod you are considering and see what people like and don't like about their choices. All the Chinese-made mods are relatively similar in performance, they only differ in button placement, battery configurations, and bells & whistles which don't really affect their ability to provide a better vaping experience.
Chances are you will find each has their pros and their cons. None will be without some flaws in their design, build quality, or feature set. For some, even the Provari has either a lack of features they believe to be important or they can not justify the cost of a better made mod.
I have no idea where Tamarac is, but if you have a vape shop that carries regulated mods, go and see them in person, handle them, vape them (if allowed). Nothing like seeing a mod in the flesh before you buy.
While choosing which mod to purchase, keep in mind that all of the mods except for a Provari can be considered a throwaway once their short warranty has expired. Few of the mods made in China live to experience much past their first birthday. On the other hand, the vast majority of the original Provari's are still in service. They have a 1 year warranty, and even in the rare event that a Provari should require repair Provape will repair it and have it returned to you good as new within a weeks time, for as long as you own a Provari. Owning a Provari is a long term investment for the long term vapor. Maybe consider saving a little longer to buy a one. Just consider these facts.