SKU 6353800 - Absolutely the best smooth flavor for me; although it sometimes pisses me off with little quirks, I wouldn't call them problems, they can be easily solved (MTL)

SKU 9433400 - Most practical for outside (because of liquid control), slightly harsher taste (MTL)

SKU 1866202 - I "grew up" on this, there was some time (about a year) when I wouldn't touch RTA's, only RDA's, and although I had plenty of them, I was practically using only this one most of the time; could and probably still can build a horizontal coil with legs wrapped around the screws with my eyes closed (MTL/tight RDL)

SKU 6309300 - My only RDL, very intensive flavor because dual coil so I probably don't need another one.