Pure Class A SS vs Tube Amp

You can get a class A Plinius SA 102 or 103 used (125 watts) for half of your target and have a world class amp that doesn't even need anything like 100dB efficiency. An upgrade/rebuild can be done for around 1500 and then you have a nearly new amp that I have compared with $10,000 amps. 

"...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.

I've never heard any Pass Labs amps, but would love to try a XA25.

I own both a class A SS amps and a class A tube amps.
I owned the Klipsch KLF 30 (unmodified) and one set of speakers I currently use is the Klipsch Forte III's.
While both amps sound very good, I give the edge to the tube amp.
I believe if you stay with a major brand name that has a good reputation you can't go wrong. I prefer not getting into suggesting manufacturers at this time.

Thanks everyone for great response 
@jyprez plinius SA is great especially option to switch to class A or AB
but I think the upgrade and also special dedicated line is little hard or who can do the upgrade for me ?