veering toward the ATPL(H) at the moment; if for no other reason than the extra information!!
I can't help but think you would be just as well off using the extra cash saved buying and reading say, Ray Prouty's book or Shawn Coyle's without putting the extra pressure on yourself to pass exams you probably won't need.
You only really need the ATPL exams if you plan to go off-shore, otherwise, CPL and IR exams should suffice for anything else.
Cheers
Whirls