brings back old memories. researched my self over 6 months. I ended purchase diamond separately, and custom designed myself.
If i remember correctly, I think the most important thing to consider was WHO graded the diamond. there are many facility but, GIA, EGL, AGS, etc. If you are buying to keep the value of diamond, U should go with GIA, they engraved serial numbers to each rim of diamond. you can’t see them with naked eye. I was told that they hold their values better than other graders. as to CUT, i ended buying round cut for great price, but CUSHION cut was more desirable. if your wife to be cares more for name brand, I would just take her to nice Tiffany store and buy their ring. Your not getting the deal, but she’ll remember the time for the rest of her life. good luck an Congrat!