Hey Chuck,
The XP10 and XA60.5 should be plenty for you. Frankly, I am shocked the Int-30A wasn't enough for your Focals. I know that Telarc recording well. That recording has been the extreme testing for audiophiles for the last 20 years!
If you are sure to end up with 1038 in the near future, you may want to wait to upgrade your electronics. You may need XP20 and XA160.5 or even XA200.5. Start saving!
Other than the strong percussive moments, did you have other problems with the Int-30A? I don't ever listen to big stuff... The biggest pieces I listen to are Beethoven's 5th and 9th. Maybe some Brahms... They are loud, intense, but not aggressive. Do you think the Int-30A will hold up?