I own the XP-20/XA160.5 combination. I think it's great, but I'll admit I have little experience with electronics other than Pass in my system. I have tried a couple of tube pre amps but they did not work with the XA100.5 when I had that amp.
The synergy between Pass products is very good.
I have not heard the XP30, but a couple owners have told me it is a big step up from the 20 and is a bit "warmer". Whether that means it sounds more like tubes, I don't know.
As Pass is difficult to audition in your location, I suppose I would keep your tube pre and enjoy it until you have the funds for the XP-30. It's brand new, so prices will come down on the used market at some point. Sorry, I can't help you more.
The synergy between Pass products is very good.
I have not heard the XP30, but a couple owners have told me it is a big step up from the 20 and is a bit "warmer". Whether that means it sounds more like tubes, I don't know.
As Pass is difficult to audition in your location, I suppose I would keep your tube pre and enjoy it until you have the funds for the XP-30. It's brand new, so prices will come down on the used market at some point. Sorry, I can't help you more.