Congrats on the first step!! I agree, I dont think it takes away from what us brides consider our "dream" wedding day. Its really just to make it official legally and that is all. my fiance and I are going to be doing our JP wedding the day before we fly out because we want both our partents to be there to witness it. We might go out for dinner (depending if we are fully packed to fly out the next day or not) but thats all we will do. It wont be anything fancy. We will probably just go to the court house, say our I do's and sign the papers.
My sister actually did her legal ceremony 6 months prior to her DW. I don't think it took away from the day at all. Her passport was expiring and she didnt want to renew twice so she got married, changed her name and got a new passport 6 months prior to Mexio. She also wanted me to be a witness and I was going away for 4 months so she made the JP wedding really early. Her actual day in Mexico really felt like her wedding day and most of us forgot she was already married. It wasn't until my grandma said... is this legal? They didn't sign any papers. hahaha. It was really cute.