Congrats on your amazing success!! I can't wait to see your pictures!
I think I'm a weirdo in that I was never sad to part with the stuff that was too big, even the high-quality stuff I once loved. I was all "see ya... now to the mall!!!"
Oooh ok so Goodwill IS your new best friend!
You can drop off the too-big clothes and then go shopping. I'm serious that you can find some cute stuff for cheap that you can wear in the interim until you hit your ultimate goal. Then you MUST go on a truly fabulous shopping spree---you've earned it!!