I just got 1.50 studs, and everything said here is absolutely true....cut is the most important aspect. On close inspection you can tell my studs are I1 .For color I went with an F,and I cant see much a difference against my G color e- ring....even though due to the unbelievable sparkle (thanks to the cut)they look extremely white when on.THATS when I see the color difference. I compromised clarity since I wanted a not so small stud for everyday use without having to pay top $$$$, but I was adamant about getting an excellent cut
Now I know that I personally prefer a bit of warmth in my stones,so I could have saved even more had I gone with an H-I color. I consider them a great everday size, and I didnt pay an arm & a leg for them so another reason for me to adore them