What size should I aim for?

I am 5'8, 157lbs, medium-large frame, currently a size 10.  Instead of setting a goal weight, I thought maybe I'd aim for a size, incase I put on some muscle.  Not sure whether to aim for an 8 or a 6....any suggestions/ideas? Thanks guys.

bump

Suggestion:  Eat healthy and workout.  Take your measurements and watch the inches and possibly pounds decrease.  :) 

You could go by size charts if you tend to buy from a specific brand. Or, I would suggest stopping when you are happy with how you look instead of when you get to a certain size.

hey i'm also 5'8. i weigh 130 right now and that puts me at a size 6 i believe. i'm only 20 though so i wear clothes from places that i bet size a little on the smaller size. i weighed 167 at one point and i didn't buy new clothes for my heavier size because i was too embarassed to go shopping. i just squeezed my self into a 6 still. pretty bad looking. i think a 6 is probably a good size to aim for, but if you're working out a lot and have a lot of muscle tone i bet an 8 would look fabulous too.