Congratulations and hope hubby has no problems with your new addition. Sounds like you gave him a good test before bringing your baby home. All of your purchases sound good -- but I would add a harness and only use a collar for looks and maybe to hang an ID tag to if you like. If you are going to attach a lead/leash, please use a harness instead. Yorkies are very prone to collapsed trachea and should never have pressure put to their throats.
Welcome to the wonderful world of Yorkie ownership! Nothing like those sweet puppy kisses coming your way!