Emerald cut help please

[NYCsparkle]

Hi. My 50th is coming up and my dh has given the go ahead to get something sparkly. Who am I to refuse? I’m looking for a lab created ec. I’m hoping to have one made like the one below between 3-4 cts and possibly double claw prongs. Help! Where do I begin and can anyone recommend a center diamond. I visually like ec that have around a 1.5 ratio.

https://frankdarling.com/engagement-rings/the-nouveau-emerald