As I'm sure you're aware, speaker choice is critical with the Lavardin. An easy load with sensitivity upwards of 89db is best.
I have used (and have for sale) the IS Reference. At 30 watts it was a good match with both my Reference 3a De Cappo I's, and Living Voice IBX R-2.
I don't agree with the Lavardin not being good with bass. Perceived bass weight depends entirely on which speakers you are using, and the size of the room.
I have now moved to Single Ended 300b tubes. In comparison, the Lavardin has a great deal of 'attack', particularly with percussion. The Lavardin is very clean sounding, with great imaging and palpable presence when listening to solo or small ensemble performers. I do not recommend the Lavardin for Classical as it cannot flesh out, or separate, individual performers.
The Lavardin seems to purvey emotion rather well. I enjoyed my time with it.
Hope this helps