I'll agree with
@djsvapour . I would rate most pod mod setups about the same as an eGo battery setup with the first generation of clearomizers. If you consider yourself a flavor chaser, the pod mod niche is probably not the answer you're seeking.
RDA's (rebuildable drip atomizers) continue to be thought of as the elite atomizers in terms of both vapor production and flavor production. You might be interested in researching "squonkers" or bottom feeding atomizers, too.
RTA's (rebuildable tank atomizers) probably come in as a close second to RDA's, but they are notoriously known for their learning curve as to wicking correctly. Something like a Kayfun-style RTA.
Some tank atomizers that use factory-made, drop-in replacement coils are pretty good at making decent flavor, too. I used to recommend the
Original Uwell Crown Clearomizer Tank, but because this tank is a few years old and the availability of its replacement coil heads are becoming somewhat difficult to find I've stopped. There are later versions of the Crown currently available; I've not had the opportunity to use them but from reading reviews they have been rather hit or miss when compared to the original.