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
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