Congrats on your weight loss!!!
Definately go to your LBS and see what they offer,i got lucky and found 1 who had an ex Clyde there,so he understood where i was headed,lots of great advice and has been there for me as problems (that only Clydes could understand)came up...
Even if you dont buy a bike from them its good to still have a relationship with a local shop.
Again congrats on all you have accomplished,the hardest part was getting off the couch..