Everyone should just relax. I understand that everyone wants more for less, but in all honesty, get a ring from where you feel is a legit place and stick to your budget. Don't focus on specs too much. Trust me, no one will care about specs once it's on her finger. If it looks nice to you, it will look nice to her. $2000 or 20,000, she will love it, TRUST ME!!
BMW...Now you're playing with power.