I do have a curiosity about equipment, but at the same time train daily. I have a PowerPong robot on my Butterfly Europa table, that I use when not at the club. Saturday's are spent at the club with a coach for 90 minutes. I am serious, maybe just not that patient.
I personally support anyone asking questions about the equipment. I just have trouble when people asking the same question when five people already said G-1 is the answer. People who have EJ'ed just know that G-1 and Rakza 7 just would not die.....
I personally enjoy answering your questions. They are reasonable questions and legit.
I think you are older now? Quite frankly you should spend your money however you want and you should enjoy the sport as much as you can. That's the way I see it.
I am in my mid 40's and I just started EJ'ing in the past 1-2 years. I always try to keep the same blade when I swap out rubbers so I believe my feedback is pretty much on the spot. When I was younger, I could not afford it. Now my career is on track, I have spent lots of money on EJ'ing. But I can afford it now. I could not afford it back then.
So don't let the naysayers affect you.
As for your original questions, never tried K3. I will get a couple sheets of Glayzer 09c coming up. So no comment from me in that regard.