First wife's (JW) ring had a 2.25ct round center stone with two gold bands with smaller diamonds flanking it. (Didn't get that in the divorce)
Second wife has a 1.75ct round center stone on a wide band with smaller diamonds around it.
I purchased both used for about 75% to 80% off retail. I would never buy diamonds retail. They don't wear out as long as they are not chipped or cracked. Buy a used one that you like and have it remounted on a new ring.
Personally, I would prefer a smaller stone with better color & sparkel than a larger off color stone.
Don't understand why anyone would pay for a chocolate or colored diamond, but to each their own.