Personally, I'd actually go with the cheapest option for wine coolers. If you have more than co2 handy, use it, but I don't feel the need to get anything different specifically for an inexpensive wine cooler that'll be gone in a month, if not sooner.
Now my regular wine and mead however... as soon as I get the money I'm getting something better.
And good point, yes, purge.
Secondary: GF Czech Lager
Waiting to be kegged, Italian Primitivo
Kegged&Ready: GF Orange&Coriander, GF Honey Lager, GF chocolate ale, GF English ale, Island mist (zinfandel), Island mist (cbry malbec).
Bottled: Infected Mead, Dry Hard ciders, Accidental Sorghumwine, various unnamed.