What's best non rebuild able tank to but

As above before I spend some cash

Probably a Nautilus or Aerotank V2 model , coils can be rebuilt for both but most don't bother.

Agreed, I prefer the flavor of the Nautilus. That said I think the Kanger Aerotank Mega is a better looking rig.

for taste, flavor, ease of use, quality build, etc the deltas and their coils are the best tank system going right now they make a 16, 19 and 23mm tanks that blow away aspire or kanger IMHO. their coils are amazing-i have never had a bad one(can't say that about aspire or kanger) and they last much longer than those others. their triple bottom coil is designed to be vaped at higher watts to take advantage of all the higher powered mods in the market. their airflow is better designed and works better. sweet-vapes or any joyetech dealer should have them and they are definitely worth a try....

I like an RBA style atomizer like an authentic Kayfun Lite-Plus (v2) .... But if you want a clearomizer style atomizer with replaceable coil heads, I would recommend the Kanger Aerotank Mega.

This 22mm diameter tank holds 3.8 ml of juice, makes for a real nice flavorful vape and don't normally have problems with gurgling and flooding.

The coil heads are not expensive and easy to replace if needed.

The price is right too ... Here is my Kanger Mega mounted on top of an old Caravela mech tube mod (clone) I used to have, along with an installed Kick module (very nice vape at around 10 watts):