I have an itaste vv/vw version 3 and thinking about buying a vamo v5 but lately people have been telling me that the two are pretty much the same except the v5 has replaceable batteries. they say they are bpth great mods. I like my itaste but i think the vamo will make far more vapor or should i just get a kayfun tank instead of my protank 2 or let the owner of my local vape shop build a nano/micro coil for the protank for my itaste?