I know this topic has been covered over and over, but here is my situation. I am trying to decide to between size vs. quality. Budget for diamond is 15K-20K. Following GIA class 1 cut guidelines (53-57.5 table, 34-35 crown, 59-63 depth, etc.) it looks like I can buy about a 1.5ct G VS1 within my price range. I plan to set in a platinum engraved band with no side stones. I always prefer better quality over quantity in most things, but if the naked eye cannot tell the difference, should I drop to an H VS2 and go a little bigger? I want everyone to look at the stone and go WOW, but I don't know which way will likely achieve that impact better. I am using an online dealer that likely does not have stones on hand, so I have to rely on grading reports and your advise. Opinions?