Diamond Studs

I've got two pairs of diamond studs, one pair is .1 ctw with 6 prongs setting, another one is .3ctw with 4 prongs setting, and I find myself reaching out for the .03ctw pair most of the time, but I'm thinking about getting a bigger pair, say .75ctw.
 
Oh, I never judge a diamond based on specs. I have to see it myself..sometimes specs looks great but when you look it at something is off. If you are good with judging diamonds always trust your eyes first. Of course i'm only speaking of reputable jewelry stores.
 
Hi, Ladies
If i choose I color, ideal cut for diamond studs, what is the lowest clarity could i go?
In the mean time, is regular push back ok for diamond stud earrings?(1.3 ctw) the screw back just hurts!