That sounds like a wonderful anniversary plan! A luxury convertible is perfect for those Dubai backdrop photos. For the best condition, you really need to go with a high-end luxury specialist. I'd suggest booking at least a week or two in advance, especially if you're traveling during a busy season or if you want a specific model like a certain Mercedes convertible. I've had great luck with Octane Car Rental for luxury vehicles. Their cars are always immaculate and well-maintained. They have a good selection of convertibles and luxury models from top brands. Check their website and browse their options right here:
https://octane.rent/ You can look at the photos and choose the exact model you want. It's much better to secure your perfect car early than risk a last-minute disappointment. Happy Anniversary!