I'm just going to stick with what I have on order already, but to those that have ZRRs, I'd suggest grabbing some in that range or higher.
Word of caution, based on my research, however... It's cool to stock up, but think in terms of 6 month supplies, because that seems to be the life cycle of the market, at this time. The "
tank" cartridges and specialized attys are about six months out from being affordable in quantity, and that technology shows a lot of promise. Ultrasonic fired attys and cartos are being test marketed on some products as well. Remember, up until 4 or 5 months ago the carto was exclusively for the kr808... Now they come in all kinds of variants... The products in this market are evolving really fast!