Why did you pick up this particular diamond? E-SI1 is a relatively unusual combination where - particularly in a stone below 0.50 - you are paying a premium for the high colour but not "seeing" it (a well cut J in the same size will look white), and yet are running the risk of having a stone with visible inclusions (not likely in this case; the feather causing the SI1 is under the crown, and seems to be relatively unobtrusive)
The cut is nothing special, and the stone is trading at a "discount" compared to others because of that and the strong fluorescence (which is most likely not an issue, but you should at least be aware of it).
Here is a stone (from the same vendor) which is significantly better cut, and IMHO will look better - for a whisker over $1000 ($1020!)
http://www.diamondre...31&item=1362914