Magnavox or RCA tube amp

I am aware of all that. I’m not asking what other amp I should buy, as I own several amps, including tube amps now, I’m looking at having some fun and want to choose between Manavox and RCA. So, given that, which one should I play with?

I would give them to the Salvation Army.

I would head over to diyaudio.com and post the question. If it's been done they've done it. Tons of good info and and some great minds there.

It depends on what your objective of fun seeking is and whether these amps meet it. Do you have a nostalgic affinity for them or do you want to build something?  If you aren’t wedded to these amps for some reason and just want to tweak a tube amp, I highly recommend Elekit kits. The new Dynaco kits look cool too. Also check out Simple Single Ended from Tubelab.  

My instinct would be to go with the RCA.  Back in the day they made some nice little 10 watt or so amps using push-pull 6V6 tubes in their output stage.  Around 1990 I acquired a vintage RCA mono integrated amp that was either the following model or one that was similar:

http://antiqueradios.com/forums/viewtopic.php?f=15&t=259618&p=2168867

I didn't have the time to do much with it, and I sold it to a collector of vintage RCA audio equipment, who was ecstatic with it.

Also, the comments someone provided in the following thread will be of interest:

https://rec.audio.tubes.narkive.com/eRuV53kN/rca-svp-10-amp

Have fun!  Regards,
-- Al