i just pulled the trigger myself and ordered the mini in black, which i've been dying for since i got into
vaping about 5 months ago. i finally talked myself into it, after spending so much money on every shiny tube type thing i have seen-i have a varitube (which i got for 40 bucks in a kit-couldn't say no to that!), a lavatube mini that i found on the classifieds for 20 bucks (can't say no to that!), an apollo mini stainless steel varitube which i love when it works (i got a good deal on it, and i rationalized the purchase by telling myself that it would give me an idea of the weight/size/form factor of the pv mini, and thanks to that purchase, i decided on the mini), and a mechanical german thing that is built like a
tank and hits great at whatever voltage it hits at with lower res cartos)...oh! i almost forgot the vmax i bought on the classifieds as well...it's the regular sized one, and i told myself it would give me an idea of the feel of a regular sized pv, as well as some sort of idea about the menu system...so in short, i have spent quite a bit of $ AVOIDING the purchase of the pro vari, which i am so happy to say is on it's way to me...finally!
in response to your question, i think dual coil will be fine-as far as i can figure out from the info i've seen (and please let me know if i'm wrong, because i'm still trying to figure the whole cartomizer resistance and coil thing out myself), dual coils produce more vapor, but make the battery work a bit harder...am i right about this? i still haven't found the magic combo of cartomizer and voltage, but what seems to work best is 2.5 or 3 dual coils at around 4 volts. i hope to have a better understanding of all of this when i finally get the pro vari in my hands. apparently, you can use just about anything on it without worrying, because you can set the voltage very low as well as high.
so sorry about the rambling post...i'm just so excited about the fact that i actually hit the buy button after months of wanting to do it! i haven't been this excited about spending this much cash on a device since i bought my first real smart phone!