This is just a thought, and please know I'm not trying to be a preachy know-it-all, but have you considered waiting longer? Maybe you could get to your goal weight and reward yourself after you have maintained that weight for a year. Trust me, a lot of things change in a year (or more). Skin does bounce back, and besides surgery the best treatment for loose skin is remaining at the SAME weight for a long period of time. I would highly recommend giving your body some time to adjust...and live maintaince for a good while before going under the knife.
Just speaking from experience...
Congrats on your awesome weightloss!