More than likely the film processor won't give you great scans, and you'll have to ask for the scans and you'll end up paying more too (usually). Pro labs do better scan quality wise than your one hour photo joints.
Spotmatics are truly wonderful little cameras, some of the best ever made. If you really plan on using them more in the future, I'd suggest getting them cleaned, lubricated, and adjusted (CLAd). The CLA will guarantee at least twenty more years of trouble free service from them.
Oh, and you can use the extremely common SR44/LR44 in them to power the meter