McIntosh MA352 replacement

Thank you all for your responses.

No room treatment.
Bass is great no need for sub. Thank you the video link.

What would be my gain on the Gold Lion tubes?

budget for a new integrated would be around 5K.

According to the youtube video , soundstage is fine  5 minutes 40 seconds

What a beautyfull gear !!!

https://youtu.be/JAgHdDtdU_g?feature=shared

@kvpower 

The best advice you received here is to get a sub, better yet, get two! You have dismissed that. The LS 50s are stellar, but a sub(s) will knock them out of the park far more than better tubes. Subs are not just for bass output. 

@jeffreyw I tried. I guess their mind is already made up even before this post.

@kvpower IMHO I would do a Gold Lion tube roll first. It's a couple of hundred $$s. If that works it will save you big bucks and you get to hang on to the Mac. If it doesn't you can resell the tubes. My bet is you will hear a significant improvement. Good luck to you.