I've read the SP-25 is essentially a SL-1200 as a stand alone motor unit, that is no included plinth or arm. If so, that suggests parts are more readily available. It also suggests it is a step lower in performance than the SP-15.
I expect either one can be musically satisfying. Also, the replaced electrolytic cap advice applies to both, given their age.
I expect either one can be musically satisfying. Also, the replaced electrolytic cap advice applies to both, given their age.