I don't recommend hiring a lawyer in the appeal if you have prepared everything yourself so far. A lawyer may be helpful at some points, but I just don't think it worth that much money. If you want to maximize your chance as much as possible, then it is a different story.
If you ask me which lawyer is good, I say "none". All laywers are born to make money out of you. After you pay them, they wouldn't even bother to answer your call or email.