Spatial M3 Sapphire or Klipsch Forte 4

If you listen at 80 db you will need a sub or two for the thump. If you listen a 95 db you will probably need room treatments to tame the room. We need more info to provide good feedback…. room size, room construction and furnishings, source and amplification, listening volume, listening position … the more the better. 
 

I own the M3 Sapphires, their sound is very lifelike. I’ve never heard the Klipsch. The M3 will have a very realistic bass tone and presentation, but the Klipsch might actually “thump” a little more/differently…. but you will likely have more of the horn presentation which some like and some don’t.

Send more info….

Based on your room  and seating position and having subs that you could cross at40hz… the Sapphires would do what you want and more… but they really do need 3-400 hours of break in… and at least 45” from the front wall and 2’ from the side walls.

how loud do you listen?

this nice little calculator will allow you to get a ballpark idea of the volume you can achieve with various wattage.

https://myhometheater.homestead.com/splcalculator.html

I would think that your single ended tube amp will give you a really nice midrange, top end and soundstage but not the best control of the woofers for the really deep stuff...but if you are committed to staying with the subs...then it might not matter.

There are a lot of threads on AC regarding the spatials and how they mate with low power, high power, solid state and tubes....and how they compare to other speakers...they are worth reading...

Here are a few  links..... 

https://www.audiocircle.com/index.php?topic=180075.0 

https://www.audiocircle.com/index.php?topic=180361.0

https://www.audiocircle.com/index.php?topic=180031.0