hi there all, got some SONY speakers at the moment SS-176e. and there very good for what they cost me. (had them from new) but i'm wanting some new ones and got my eye on SONY's SS-B4ED are they going to be better than what i have or should i get some think different? and how do they compare to what i've got. CD player SONY XA20ES, Amp SONY FA30ES. BI-WIRED. Thanks Si.