I'm sure that you are going to get a lot of different suggestions when it comes to this, but I love my NGK's. I'm running UR5's gapped at .030. As for the E-3's, I don't know of anyone that is running them so I can't comment on them. Nice looking GN you have there. Cheers!!
I had E3 plugs for a short while. Car idled a bit rough. Car was new to me & I figured it was the V-6 idle quality. Learned a bit more & replaced plugs. The driver side rear E3 was black & looked like it had never fired. Idle quality & overall performance was much improved with the new plugs!