IMHO: Lunars for snapping up and flipping (short term) Kooks for longer term holding. That's the impression I get from the way they move in their respective micro-markets. I prefer Kooks, but that's my preference. Why? More stable, less hype-ish. Edit: Lunars at a decent price are always a good idea too, getting them for low-ish premium is difficult sometimes though
We still can find old kilo Kooks from the nineties for small premium while you'll rarely find an S1 kilo coin for less than $1000