Pure Class A SS vs Tube Amp

"...I’m trying to decide pure class A or Tube amp..."

There are lots of tube amps that run in class A. Look for single ended triode or pentode (or beam power) design tube amps. No experience with your speakers but Line Magnetic models with 300B or 845 tubes sound fantastic with high efficiency speakers.

"...first 6 watts is pure class A sounds really good I’m just wondering what I’m missing i guess I need more class A..."

With speakers @ 102dB efficiency, of course depending on your room size, I suspect most if not all of your listening is within the class A envelope.