I agree on not using the big chain stores, you're paying for all of their overhead, not better quality. I used Adiamor.com (which happens to be in LA) for both rings and the diamond, I was extremely happy with them and what I got ($1300 diamond with appraised value at $2200). If its not a suprise let her pick the ring she wants, you pick the diamond. I spent some considerable time researching diamonds and if you really want some help I can spend some more time after WENT passing along what I can. What I ended up getting was a 0.61 Carat Round, Excellent-cut, J-color, VS2-clarity Diamond, and it still amazes me how much it sparkles and appears bigger than a .6 compared to others. There are other measurements (physical ones not grades) and a ratio that makes a huge difference in appearance, I spent time looking for those numbers and then looking at the 4C's within that. I finally found one that had the numbers I was looking for with good grading, the lower J color and VS2 were offset by the excellent cut, polish and symmetry and it came at a good price.