I have several evods and protanks 1 & 2 and the protanks are better by far imho. My evods are very finicky, while the protanks are beasts all the time, never get a bad draw, and if you replace the 2 - 1mm wicks that sit on top of the coil in the protank, with 1 - 3mm wick, the draw and flavor get much better.
I have also gotten great results from the vivi nova, but with a little bit of leaking, plus it's not glass so you might get some tank breakdown from some juices.
The vivi novas are easier to refill but I like the bottom coils better.