I've been liking the eVod's too. Great little tanks. Once you learn to rebuild the coils, they perform even better than stock. I usually have 2-3 with me most of the time for flavor selection.
I like the pro-tank mini pretty well out of the Kanger lineup. It's about the same amount of liquid as the eVod, but it's glass so it can handle any liquid without problems. I also prefer the vapor production over the eVod a bit more. As mentioned previously, the actual Pro-Tank is pretty solid, but it's a LOT more finicky than both the eVod and the mini. It holds more juice, but it also uses more from my experience.
The good news is, though, is that all three of these units use the same coil, so it's a lot less to maintain. Now that I'm rebuilding my own coils, I've noticed that the Pro-Tank likes a slightly different wicking setup than both the mini and eVod for best performance. If you can see yourself re-coiling, give it a thought. I felt a custom made coil outperformed the stock units by a pretty large magnitude....better flavor, vapor and longevity in every regard.