Good luck on your horse search! Remember to keep an open mind! I hated riding big horses, and didn't want anything over 16hh (huge in my mind) I ended up with a 16.3hh beast who is NOT still growing (in denial)
And, a big bodied horse might carry you better then you might think. My long bodied 5'11 dad fits my 15hh Qh/Paint better than his 16.2 TB.
Oh, and be sure to post pictures and have fun!