What tube amp for Harbeth 40.1


I am looking for a tube amp for Harbeth 40.1.  I know many suggest SS amp such as Accuphase, Luxman, Hegel, McIntosh ... etc for Harbeth, but I decided to keep it with tube.  I also don’t think I need a lot of power.  I currently have a 8W custom built 300B and had a 18W Almarro 318B, and to me, they sound fine.  However, I think more power will help, and I never know what I missed until I try it out.  Having said that, I don’t think I need crazy power.  Anything 30-80W is good enough for me.  I am 3m away from the speakers, listen to Jazz at avg 83dB.

i have the following short list:
1) PrimaLuna Evo 400 integrated
2) Leben CS600X 
3) Linear Tube Audio Z40

Which one do people like with Harbeth?  Any other suggestion?

Among all qualities, I value holographic presentation the most.  I really like the feeling as if the singer is floating in front of me, if you know what I mean.  And my current 300B do pretty well in this regards, and I read this is what SET amps are good at.  Will I be disappointed with the above?
Thanks.
gte357s
@cd318
That is a cool video! Interestingly when he actually played a recorded song as opposed to a test CD, the max power peaked at like 30 watts. So as they said you really have to take into account distance, listening levels, types of music you like to play and then match an amp to those personal characteristics.

Why should that rule out a carefully selected tube amp? Well...

Well yes on the HARBETH private forum (HUG), they humiliate anyone who wants to go tube. Basically the message is don’t need to spend a lot on amps, just buy the most watts you can even Class D over tubes. I bucked that trend and have the 40.2 Annies with the LTA z40 and it sounds glorious to me but what do I know...i listen with the grilles off, another big no no you will get ostracized over. Probably going to LTA Ref monoblocks which will get me almost 100 wpc at 6 ohms the minimum impedance.
I'm running my Harbeth C7ES with an Aric Audio Transcend Push Pull amp with either KT88 or KT150 tubes(45 and 65watts).I also tried them with a pair of QuickSilver mid monos w/EL34,KT88,and KT150.The KT150s have the biggest liveliest sound,the 88s are good too.As expected,the EL34s run out of steam rather quickly.Personally,I prefer the tube amps over the 120 watt ss CJ amp I tried also.
IMHO the Harbeth 'house sound' puts you a few rows back as opposed to front row as far as dynamic swing and transients whether ss or tube.If I were in the market I would give one of the LTA amps a try.I have one of their preamps that I am extremely happy with.Just my two cents:-)
Thanks for all the replies.  A lot of good suggestions.  I picked up a McIntosh MC275 IV yesterday.  The reason is that it is a local sale, the price is right, and it has a gain control.  I don’t have fund to buy a preamp now, so, this is a big plus.  I connect my source directly into it.  The McIntosh is more readily available in the used market also.  But definitely will try those other suggestions when something comes up.  I tried it briefly on my X5.  It is pretty good, but also don’t feel much special.  I will try it on Harbeth later today and report back.  
@gte357s 

Definitely let us know. Hope this thread keeps going amd includes more user experiences....Harbeths with SS and/or Tube.