Believe it or not, I'm still playing a 12 year old Solton MS-60...6 times a week...outside all summer...this thing's a TANK! If I upgrade to an SD-1 or SD-5, will I still have the same concerns/issues with mono amplification you folks talk about with Yamaha arrangers?. Will new Ketron samples need stereo amplification to sound the best?

Thanks,

Russ