Guys, when I was sourcing for my fiancée's ring I did a lot of reading and research. I came to a conclusion that all brands will try to sell you their brands from showing you a perfect hearts and arrows to lazare's ideal cut. To be honest, all brands will say they are ideal cut. Finally I decided to use http://Pricescope.com/ (ask for the diamond's GIA cert and plot in the numbers)
Any diamond rated 0.4 to 1.6 does return a really good shine. Using this I source for my diamond. I was able to find the perfect diamond and a nice setting. Let me know if anyone of you need help. Good luck guys!

Those buying from sg, I suggest visit Jann Paul for more diamond knowledge. And try canary. I find them to have better diamonds than lovis

I got mine from canary. Mine is .9 E vs1. Price is not cheap. But perfect for my fiancée. I'm just suggesting you try both Jann Paul and canary too. In fact I find them to have better diamonds than Larry's also. Good luck my friend. Make sure you use HCA. The grades there really shows the diff. My fiancée .9 shines much much more than her boss's 1.1

Spot on fuzzy. Sounds like u went through the exact steps I went through when I was sources my stone. Did a lot of homework. In the end is a personal choice; to me, brand is secondary. The diamond's brilliance and cut is priority. I compared a couple of Tiffany diamonds on pricescope and the returning rates are really poor. The sales person have no knowledge about this area. Mind you this is Singapore, takashimaya.

Guys, I strongly urge you to use pricescope to determine you Diamond's return light and shine.

I used it when I was sourcing my diamond and it was perfect.

Personally I feel there is not point in just size if the shine is bad.
Mind you, whether is triple excellent or ideal cut or whatever bullshit they may say. The actual angle and diameter of the diamond does play a more in depth significance.

http://www.pricescope.com/tools/hca
Ask for the diamond's GIA cert
input the depth and table percentage.
crown and pavilion angle.

A score below 2 (Excellent) means you have eliminated known poor performers (more than 95% of all diamonds). Your own personal preference may be for a diamond with an HCA score of 1.5 more rather than one with a lower score of say 0.5.

Good luck.