Harbeth 30.1 or 40.1

It's a definite yes, space and budget permitting. 

I didn't want to imply that the subs weren't integrated well, they were, but it was just a different experience than when I listened to his setup with the Super SHL5 Plus.  With the 40.2's the bass had more presence and was closer to what you would experience with live music.  With the Super SHL5 Plus, the bass was tighter, more dynamic, and punchier, but maybe less "organic" sounding.  Neither were bad, quite the opposite, just different.

Big Harbeth fan. Heard them all and owned the C-7s for many years. the M40 is an amazing full range speaker--one of my favorites of all time. IMHO, too big for your room--you won't get the best from them--they like room to breath like all Harbeth models. M30 is my least favorite Harbeth--by far. It does not have the same magic that their other models possess. For your space the HL-5 or C-7 would be my recommendation. In that room you won't need a sub and in my experience one is not the preferred way to go anyway. Both speakers are readily available used so pick up a pair and try them out! 

@dodgealum 

i am with you -- can lead horse to water but it may not drink lol

@big_greg 

like your report - i would only add that all but the tiniest harbeths do benefit from strong amp control of the woofer(s) - therefore hegels are so good a match as many have found

yes there is great nuance and magic to using tube amplification, but therein lies the trade... bass control is sacrificed and bass impact lessened in exchange for midrange magic ... this particularly key for 40 and hl5 - where with the wrong/weak amp the bass can bloat and slow to a crawl

Once again, thank you for all the opinions.  Even though logically I think I should wait for the M3 to come up, But gosh, I can’t get the 40.1 out of my head!  I keep coming back to read all the comments.  I read them all three times now.  One of the reason is that the M40.1 is a local sale, and I know these speakers can be rare to come up locally.  My emotion keep telling me that if I don’t buy them now, I may not have a second chance.  
The C7 and SHL5 plus suggestions come up a couple times.  I researched on them, for some reason, they don’t speak to me.  Firstly, I don’t like their look.  Then I listen to all the sound clips I can find on the internet, and none of them speaks to me like the M30.1, and M40.1.

And the M40.2 is way out of my budget.
My speaker journey now is rather short:
B&W CDM 7 NT -> Zu Omen Def -> Spatial Audio X5

I remember the B&W sounds dull no matter how much power I throw at it, it seems I like more life-like, holographic sound.  This is why I choose Spatial with OB design.  
One more question, I hope the Harbeth, even they are not efficient, they sound different from B&Ws.  Although I can’t generalized the CDM7nt as the B&W sound, but I got similar feeling after auditorium many box, not so efficient speakers at different shops.  

Just to add, I audition the B&W 802 with high Classe amp at the dealer many years ago, and I got the same feeling, full and nothing exciting.  Then I hear a big Maggie, and I got goose bumps.  The singer seems to just floating in front of me.  So ... just to give a sense of my listening taste.  Do you think the I will be happy with the M40.1?  If it is like the B&W, then I will avoid them, although they don’t seem like the case.