Yikes. It seems like for people in US and Canada CDJ is the best choice and for others: YA. As I'm living in the US, I'm glad I ordered from CDJ even if they're shipping is pretty steep.
Like gothicayu said, it ends up not being that different from YA since while shipping is cheap, the CD prices are jacked up. I will be buying some tour merch from YA tho so I'll just see how that goes and hope everything goes well.
I still wanna keep my options open though. I would like to buy from mu-mo since I got myself a tenso address now
but I'm still nervous about buying from a site I have to use Google Translator to understand anything from, lol.