Yes, thanks for fixing the location of my post.

So – I did figure out that basically all of my lag was just due to my Sony Internet TV.  Even when I used the RCA video output from the Pi to the TV, I saw about the same lag.  (I also tried turning off things like “CineMotion”, noise reduction, etc., but it sounds like some digital TVs are just not meant for gaming.)

I rummaged up an old CRT TV, hooked up the RCA video and the audio, and the lag was gone!  Plus now it REALLY has that retro feel, being on a tube TV…

Anyway, thanks for the support – maybe someone else can benefit from what I’ve learned.