I like the same one you do, vwluvervw. Even the original font. I agree with the others about the word "invitation", but I wanted to reply to suggest that you make the date BIGGER! That is what we are really excited about here, right? I think that the date would make a great secondary focal point (after your beautiful ring, of course!).
You'll probably want to fool around with it a little. It might look best if you flip the date and the second line so that it reads:
Almost 4 years. . . .
Marc and Meg. . .
I really like these cards!