Harbeth 40.3's. Should I buy them?

@desalvo55 which T2000 do you have, the 25th came with KT150s and 30th anniversary comes with KT170s, or some older model?

Both of these later amp units should be fine in Pentode mode with the H40.3s at moderate volume levels. Sure, a little less drive in Triode mode of course. Kinda also depends on how often you/r family listens to loud rock music. Maybe not designed for that so much, more of a musical finesse speaker than a rock monitor.

Always buy the Harbeths....By the by the only speaker I ever owned that didn't rock was a Tannoy but the issues were elsewhere perhaps...Tho I drove them with some Krell from the 90's. The JBL they say that rocks can just be shrill. Speakers that are supposed to be acceptable for only certain types of music is a theory that I don't ascribe to; Like different alcoholic beverages having different qualities of buzz- I don't think so and I'm a Friend of Bill's and I've seen 350 Dead shows for starters.

Personally the MBL 126  standmount speaker with a good sub,or two 

like the SVS -SB 4000 sub are a exceptional match  why  not only do you get a omni directional  loudspeaker where even off axis it sounds exceptionally good 

but this is their entry level speaker but have the same tweeter and midrange driver 

thstis in. Their $$ 100 k Loudspeaker if you heard them you would buy them no box

resonsnce and detail and speed Thst box speakers can rarely equal , with 2 opposing mid,bass drivers , a friend in our audio club owns them and a end game speaker they say 82 db efficiency but more like 86 db or better since music is coming out in 360 degrees equally ,Xover the sub around 55 hz you then have a full range monster total outlay around $20 k , but this setup speakers at $50 k 

just look them out great reviews Everywhere and with their grill screens off they look very unique with Thst exceptional MBL build quality.

You might want to take a look at the Vandersteen Tree CT's. I was a Harbeth owner for more than 10 years, SHL5's and M40's and though I enjoyed them for a long time I became bored with them. Great with some music but not everything. That may have been due to my room, electronics or any number of things but I got to the point where I had stopped listening to music. My musical tastes are all over the map from R&R to Classical and there were some things that the Harbeth's did very well but I just lost interest. I stayed with Harbeth for a long time because they play well at low volume which became a priority for me,

I moved on to the Vandersteen Treo CT ($9,995) which also plays well at low volume but sounds great with everything I play. Now if I were looking in the same price range you mentioned, I would look at the Vandersteen Quatro CT with it's built in subwoofers. I'm not sure they would work for your Allnic Integrated as they need an external crossover. My Aesthetix Mimas Integrated has one built in and I know that Ayre and Aesthetix have built-in crossovers available as an option. 

I would say that whatever you do you should try and hear whatever speaker you look at either with your electronics at a dealer or in your own home. No one else can really help much as we all have different listening priorities. Good Luck!

"I would have 14 days to return them. I would lose on shipping costs, that’s it."

At that price, up in my neck of the woods that purchase is called  a no brainer!