Thanks for the replies and info, guys.
I think musically NMB isn't going to be that much different from AKB or SKE so ultimately it will come down to whatever sort of image they have if I will support them financially or not.
I'm definitely not expecting them to be like SDN since they're younger but I just don't know yet if I should order their single even though waiting too long will mean missing out on the first press bonus. :/
Edit:Forgot to ask: does YesAsia give out bonus photos or any external bonus that doesn't come packaged inside the CD case for xxx48 releases?