Juan,
I like #40 very much. I think the word Invitation is hard to read though. Can you try to make the first letter "I" more readable. Also could you do a 2nd one with the word "Invitation" in a font like Copperplate or something formal, leaving the rest as is? This is great for a stacked logo as well. On my store the front will have a sign this would be perfect for. The back of the store has a horizontal sign. What would a logo like that look like in this case?
Kristin