It would help to know what you have already heard with your set of gear, what you liked or didn't like about the sound, whether you felt you needed more power, etc. It is hard to make recommendations without knowing what general direction you want to take. Any kind of context would help, such as "I heard it with XYZ amp and I thought it sounded too lean and hard for my taste."
Also, it would be helpful to have a general price range in mind and whether you would consider used gear. Tube gear is pretty durable and easily refurbished, so, willingness to consider used gear would open up a lot of possibilities.
I am guessing, based on the list of candidates you provided, that certain brands would be outside of the price range you are looking at, but, used gear from these brands might be in the running (VAC, for example, comes to mind, Jadis might be pricey even used).
