Depends on style of music.
SR-16 was from 1990 so may sound a little dated (it's okay if you're using it for demos or keeping time during practice sessions).
Not too bad for pop and rock genre.
Boss machines especially the newer DR-770 and DR-880 should be quite good for pop, rock and techno (a guitarist play techno??)
Featurewise, I find Roland/Boss drums easier to program but this depends on individual.
No comments on Zoom as I have not used one.
Trying them out is still the best advice I can offer.