Plugged a few diamonds found on
http://www.exceldiamonds.com/ into some calculator, asked on the PriceScope forum for the top picks then emailed the jeweler and he picked the best one, shipped to PA, tax free as he is in NY, Saved $3K+ in taxes. You need to either see the diamond or trust the jeweler because I found one that sounded great on paper but a less scored diamond looked better to the eyes.
Tool used:
http://www.pricescope.com/tools/hcaI wanted a diamond that sparkled at restaurants so the guys on the forum told me to find excellent scintillation.
Cut: Ideal (AGS: Ideal Light, Ideal Polish, Ideal Symmetry)
Colour: H (not that white)
Clarity: VS2 as appraised (AGS: SI1)
I cheaped out on colour and clarity.