Although I'm not new to stacking. I am however, new here. So, respectfully I would say yes now is a good time to buy. If I wasn't concerned with repositioning myself regarding PM's I already have & ridding myself of some premium coins I bought late last year, I would be hell bent on buying @ current prices.
There is no certainty things aren't about to change upwards, considering Cyprus & following economies & yes, also the unsurety with Korean conflict. Who knows? All depends on how much you already have & how much you are considering purchasing?