If you like top coils wait for the iClear 30. It's said that is the Nova's killer.
If you want to try a bottom coil, have in mind that the draw is lighter and vapor is cooler. I suggest you also pick a Vapeonly BCC. They're not finnicky, just wash prior to use, load with your juice and start with a lower voltage. Half a tank through try removing 1 wick and see if it gives more vapor. keep extra wicks to gauge for thicker/thinner liquids.
if you have burnt taste first prime the T3 or vapeonly blowing into it. If it goes on lower your voltage. BC vape better at 3.5 to 4.2, more than that burns your liquid.