To each his own but why spend $$$ on a keyboard and put it thru an inferior sound system. .I see these cheap speakers in Sam' s Club all the time. Theres a reason they're so cheap. Big names like Bose, JBL, RCF, QSC, etc. do perform better even if you are paying for the name to a point.
Customer service comes into play too. I'm not a Bose fan but do know of examples of their excellent customer service.