I would be a bit wary of the Jolida. I know a dealer that gets a lot of them back for repairs. He said that in the past the repairs were pretty minor, but in the last year and a half or so, he has had a lot of problems with expensive parts, like the output transformers.
I have heard several different Spendors, including the S3/5, driven by amps made by an Italian firm, Synthesis, that do a very good job of bringing these speakers to life. I believe their website is synthesis.co.it.
The two reasonably priced tube amps that impressed me the most at CES this year were the integrated amps made by Rogue (@$1800) and an integrated by a Chinese firm, Consonance. Both sounded great in their respective systems, the Consonance also looks pretty good to boot.
Is there any reason that it has to be a tube amp? I've heard the S3/5 sound very good with Naim electronics and I bet they would sound good with other good solid state stuff like Lavardin.
Good luck in your search.