I would never pay 30k for a diamond that was only "very good" cut (or even less money, for that matter). The cut grade is the most important specification. If you've got that much money to spend, I would get an AGS 000 with hearts and arrows
There are ideal and signature ideal cuts for around 30K, but less than 3 carats (around 2.5 - 2.7 ct) on the website.