I run a VTR right now and it does all I need. However, I am wanting to get a stick VV battery in the 1300mah range that I can hopefully use my tanks on now without the mini tanks. Something a little smaller. Although with my big hands the VTR disappears with only the drip tip exposed, it is just a bit heavy to carry some places. So I am looking at eGo Twist and Vision Spinner batteries for that trial.
CC
I use a VTR and AeroTank as one of my daily vapes, wish my Mega would fit on it without that extender. Yup, it is hell built for stout and heavier than any mod I have picked up. I love it! I tried out an Istick at the B&M with my Kanger Mega on it and it was fantastic!
normally run it on a KSD Vamo Light, powerful, small and plenty of mah. I would skip the eGo or the Spinner and go there.
To the OP. I would get a big newer Kanger. Seems that no matter what brand you choose the larger tanks hit harder than the smaller ones. That said, I use a Kanger Aero mini daily too

it certainly uses less juice and gives a decent hit, though I run it on and SVD now. That was the clearo I upgraded my Protank 3 mini to and what got me off the smokes.