Hi @bjorn
The Spinner (version 1 or 2) depending on your budget will power many of the commercial tanks beautifully
If you want to go rebuildable at a later stage you can get another battery device, but the Spinner and tank will then make a perfect backup vape
As for the MVP, it is box shaped. Also an excellent device with super long battery life. Check out the reviews in the hardware reviews section.
Well worth the upgrade to any of these devices in my opinion. You wont go wrong
And @Silver beats me to it. haha