Thing is, the X1 data is extremely unlikely to work in the SD5 or Audya. Only the S910 is going to allow you to use what you have previously created in the way of styles or registrations.

If the Audya's price is a sticking point, maybe go back to something familiar, yet still quite improved (Ian swears by how much better the S910 is over the S900) and in the same ballpark pricewise (even an SD5 is a BIG jump up in price compared to an S910), and just keep salting away what you can until you can actually afford what you WANT...?

At least that way, you will have time to see if the new mini-Audya is more affordable and more in line with what you need - the SD5 is definitely 'yesterday's news' by Ketron standards.