I am a fan of the investing thing. Invest in something (Gold, silver, land) with atarget sell date, maybe 10 years, and designate the money to go towards any gun, vacation, shooting experience at that time. That way you will undoubtedly have more than you started with, and if you guys break up before that, you will get half back. Sorry, I am a realist not a romantic. Too many friends been down that road. Someone older, and close to me once told me a story about he and his wife when they first got married, 50 years ago. She wanted a fur coat, and they had zero money at the time, because he had just took a mortgage on a house, and bought a cheap company in the same year. He told her "I can buy you a Chinchilla coat now, or buy you the whole farm one day". She went with the 2nd option, and it worked out. My point is that if you're talking about a 10k gift at the first stages in your relationship, there are likely better things to do with that amount of money, which will pay off in long term far more than a gift. When you're married for 10, 20 years and happy, 10k is a fine milestone gift. Also, without knowing anything about her, you are setting a gifting expectation from the start, which you may need to live up to in future years. I didn't answer your question directly, but see an opportunity to relay observational experience.
Also, if I had it to do over again, I would've had a super small wedding with only immediate family, and small party at someone's house, would've invested or put down payment on a house with the many thousands spent on making everyone else happy at the ceremony, nobody remembered it 2 years later.
My wife of 22 years agrees.