Have you considered second hand? I got a 0.47ct F VVS2 Tiffany solitaire for $1600, authentic with paperwork and serial numbers checked in store. I also wear it as a rhr and find it plenty fun to look at, it's a great setting for showing off the sparkle! However when I wear it I don't wear my ering on the other hand because they are a bit repetitive if worn together.
If you do go for the secondary market be careful of scammers, but there's a ton of authentic deals out there too.
You should go try these on in person first, that should help make up your mind quickly!