eschn3am
how much do you think your score would improve if your V remained the same and your quant jumped to 48-49?
schmegs would have an incredible score! I got a 710 with 48Q 40V. I'd say he/she would be close to 99th percentile with a 48Q 42V. like riveripper said, 750 range.
Is it worth the extra $250 and all that stress? it depends I guess... there is always the risk that your score will go down. there is a 30 point standard error... so you've got a 1/3 chance of scoring lower than your true ability... do adcoms really see that much of a difference between 720 and 750? I don't know.
I think it depends on your background and your overall package. If you are an indian male who works in IT then you want to do as much as yo ucan to stand out from the crowd. if you've got an interesting background, a good transcript, etc... it might not make a difference.
don't worry about it right now. relax and enjoy your score --- a score which 94% of test takers would kill for!