I'm a firm believe of the protanks, I went from a Ce5 to a Protank 1 (not mini) you can use a "beauty ring"(supplied with protank) to make it more visually appealing
The difference was massive in comparison. The bottom coil on the protank meant your wick was always wet, so less, if any dry hits.
Since then I have bought the protank 2, 3 the 5ml hypertank, kamry x10 and a Aga T2
re-Building your own attys makes a massive difference too and is cheaper