I have to agree with Stan.

The only reason to try to get a medical would be if there's something
like a 172 or Cherokee around that you want to get some of your
training in.

The key to the Sport Pilot category is to never *LOSE* your medical,
and never be turned down for one. If you think you have to try for a
medical, find an AME and ask him for a NON-FAA physical exam, to find
out if you will pass a real FAA physical. If he says you wouldn't,
don't take the real exam and fly on your driver's license.

Do the same thing when it comes time to renew. Get a pre-exam, if you
are going to fail, just let the old medical run out.