Mordante, integrateds are not out of the question. If I can get a a quality integrated with the power to suit my speakers, I would have no problem with that. My only concern with tube integrateds is that I really don't know how much tube power would be enough to properly drive the Nolas, and many of them in my price range seem to have a rating of 60 watts or less. So I can use some feedback in that area if you have some suggestions. However, I have read some positive reviews on the Cronus, Primaluna integrated, Vincent, Primare and Musical Fidelity, but I'm still researching.
Regarding tubes, one of the primary reasons that I am considering them is just about everything I read about Nola/Alon speakers, from owners and reviewers alike, the overwhelming sentiment has been that these speakers prefer or sound best, or have been voiced with tube amplication. I've read that the owner of Nola personally uses the ASL Hurricane. So that is my reason for looking into tubes, and I believe that going with separates, a tube preamp and ss poweramp, may give me the best of both worlds.
Saki, I hope the above addressed some of your questions. Regarding budget, it really depends what I can get on the used market. If I can get a quality power amp for a $1,000 or less, I would strongly consider buying a new Rogue Perseus or some other tube pre with a phono stage. That said, a pair of Rogue M150's at the right price would find a new home in my system, and I would just have to wait and save for the preamp at that point.