Croft, NFD or Lavardin for Harbeth M40.1

"I am uncertain what your angle is given we have no idea what ancillary equipment is being used."

That's exactly why I didn't recommend anything. OP states he's getting better sound with a cheap integrated, than with his expensive tube gear. Given that, I think some research is in order before buying any new components.

" I can assure you that the Croft kit will have a fine soundstage as recommended."

Yes, you can assure me, but that's no guarantee. You can still be wrong. If the Croft doesn't match well with all of the other components in the system, the OP may not get the same results as you. Stuff like that happens all the time.

"My room is about 15 ft x 24ft and I usually use the tube amp however my pre amplifier were sold and I was use the NAD 320 bee Int amp as temporaly solution but I found they sounds superior compare to my megabucks tube amp . ( Shocked ) "

You're lucky. This usually happens the other way around; after you spend a lot of money. The more money you spend, the easier it is to make a mistake. My advice would be to not buy anything until you've had a chance to do a thorough evaluation. Besides, you've already have a nice upgrade with the NAD.

The OP just got rid of some expensive tube gear that didn't outperform his low cost integrated amp. Why recommend a product similar to the one that just failed him?