I know
of the Revolver Gemini and Volcano Magma, but know very little
about them. [Psst. I did purchase the Revolver Elite awhile back and cannot recommend it. Don't tell anybody; I'm embarassed to admit my momentary weakness.

]
I've read that the Gemini is a 510 clone sold with an automatic and manual battery and with both a regular and a LR atomizer. I understand that the Magma also is a 510 clone sold with
automatic batteries. Both are sold with their own unique PCCs. Since the Gemini kit includes a manual battery, I am surprised to learn from you that its PCC does not accomodate it (although that is confirmed by others).
So, obviously, you know more about those products than I. Regardless, if you are prepared to spend $80 on a 510-type starter kit, I suggest that you consider the 650 mAh eGO (aka Tornado) or one of its even higher-mAh clones: no PCC needed. I think a $35 Joye 510 starter kit is a great way to
enter the world of vaping, but you are already
in that world
*, a world which the eGO has taken by storm. It is almost universally acclaimed. [The only debate is whether any of the clones (or a mod) is better.]
The eGO (or Riva, MaxX, or Hello016) enables use of the regular 510 atomizer (any brand), LR 510 atomizer, or 510 cartomizer and vaping all day with
out having to swap batteries from a PCC. [I like to keep my Blackberry in my shirt pocket, not a cigarette pack substitute.]
* Or, since you have not yet tried the 510 atty, you could indeed start with a $35 Joye 510 kit and get eGO batt/cone/charger later if you like the 510. You may find that you don't like the 510 that much and might prefer the Kr8, 901, or penstyle.