I'm not sure I can help. I'm not really sure what your question is but I'll give it a try. I'll address the quality issue first, yes Klipsch Heritage is a quality line and have very good durability. Some systems from the 40s are still in use with just some minor upgrades. Also being a horn design they work very well with tube equipment and are a good match for gear of this type.
Now the confusing part, you say you want to improve your sound stage. That implies better 3D sound with strong imaging and placing the sound into an exact space. The master of that kind of sound are panel speakers or perhaps moving up the line with B&W to the 800 series. But none of those work well with low power tube gear.
Having said that I wont be selling my Klipsch speakers anytime soon. If I live another 30 years, I'll still have them, they are a timeless design. I think you might want to listen to some examples first or define exactly what you are looking to do.
Thanx, Russ
Now the confusing part, you say you want to improve your sound stage. That implies better 3D sound with strong imaging and placing the sound into an exact space. The master of that kind of sound are panel speakers or perhaps moving up the line with B&W to the 800 series. But none of those work well with low power tube gear.
Having said that I wont be selling my Klipsch speakers anytime soon. If I live another 30 years, I'll still have them, they are a timeless design. I think you might want to listen to some examples first or define exactly what you are looking to do.
Thanx, Russ