Sansui AU X-501 vs AU X-701

Hi everybody,

new "Sansui-lover" here - I've just got my Sansui AU X-501, cleaned it with DioxIT, etc. and it plays gorgeous with Infinity Reference 61i speakers and Technics SL Q3 turntable.

Question - will I benefit from the "bigger brother" - AU X-701, or let's say it this way - is 501 not too "weak" for these speakers?

Thanks!