Here's another recommendation for Zenith tank -- I use all the versions with the original one (on sale now at Innokin) being my preferred until the newest one, the Zenith II. The small changes don't affect the vape, but it's nice to have a flat top and small improvement at fill port. I prefer the 1.8 or .8 coils.
I suggest getting the Z80 kit which comes with a Zenith II. Great little mod (you do have to buy an 18650 battery) with FO technology (alternating current) which really seems to help the coils last quite a bit longer. It's the best "set up" I've used in years.
I was quite a Nautilus fan for ages (Kabuki was my tank of choice) and after trying a Zenith tank I phased over to Zenith almost exclusively. Not only is the vape quite similar, it's easy to fill and easy to replace coils. To me it is an upgrade, in many useful ways. I seem to recall the coils lasting me about twice as long --- now with Z80 it's even more.