That's great to know that I was right! I found another example after writing you and was pretty certain that's what it was. Identifying rich cut glass is not something I attempt very often - not until lately, anyway, so it feels like an accomplishment.
Sorry, I didn't see the mark photo. It confused me when you said '03-'10, but now I understand what you meant.
I'd like to see some of your other cut glass. As you say, there was/is a lot of it being made in Eastern Europe, but often it can be fairly easy to distinguish between that and American items, which generally are much more desirable (if you equate desirable with how much people are willing to pay for it).
That really is an amazing piece, and it's also pretty amazing that you have another piece in the same pattern.