Hi everyone. I currently have a fender vibro champ amp which my neighbor gave to me. I only have one effects pedal (Boss DS-1 Distortion) I would like more effects now. My question is, should I buy a effects processor or a solid state amp with built in effects? Thanks.
Are you looking for effects or for an overall new tone?

Built in effects can be good if you need an all in one package, but they're never as flexible as pedals.

In your case, your amp is pretty good [maybe not for your styles of music, but a generally good amp], so if you want effects, I'd get a few pedals.

I recommend a Delay (such as a Boss DD-6) and a Wah for overall versatility.