It all depends on how colour sensitive you are. I bought a Crafted by Infinity diamond, M I1 1.5ct for around $4000. Its a beautiful cut and its very sparkly but its as low as I could comfortably go. It can look slightly yellow in some lighting. Mostly its a lovely creamy white.
Since I have been a member of PS, I''ve learned that cut is crucial. A lower color can still face up white if cut properly. So if I were to pick my e-ring stone, I would go with lower color (with cut was ideal) to have a larger stone.