That looks like a nice device. Is it made in America? Thank you for sharing!
If you want to rival the power/tough/quality of the provari at a lower price, you may want to look at this:
PureSmoker LEGACY Standard [18650]
If you get that, with the extender and the kick, you'd have good power wrapped in machined stainless.
LEGACY Extension Tube
EVOLV KICK - Boosted Power Regulator
The kick is a wattage regulator. I'm not sure what the limit is. I'd want to check that out before buying. Total price for this combo is about $150. If you don't already have IMR 18650, add for that.
They must be terrible. 