Please help me decide. TFV4, TFV8, TFV12

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What would you recommend? I have heard great things on all these but I am not really sure which one is best to pick up. My main concerns are flavor and atomizer life. They all seem fairly priced but I am not sure which one would really be best for those specific things. I have read reviews but I haven't seen a direct comparison of all 3.

Thanks to anyone who can help me with this.

Please help me decide. TFV4, TFV8, TFV12