[nedorama]

Champ is Fender's simplest circuit, and didn't really change much from the blackface to silverface years. Save your money and get a silverface.

On speakers, the only concern on Jensen is it's not the original Jensen company (a company who bought the rights to the name) so some have found their new speakers to be good, others not so much. I have replaced my Princeton/Princeton Reverb speakers with Webers, and found them excellent people to deal with to recommend the right speaker for the amp and your playing style.

SS rectifier - part of the charm of the Champ is the early breakup you get with the 6V6 and a tube rectifier. I'd get the amp working (no sound could be a bad rectifier tube) before I swapped out the rectifier to a solid state one.

You may also want to fashion a RCA - 1/4" speaker cable - that way you can connect your champ to a larger external cabinet, which can be interesting tonally.

Good luck!