... letters are always better than pro letters. You should go with ... a pro letter only if you can ... obtain. So go with a pro letter if you need and ...
It doesn't hurt to send some "feeler emails" to prospective profs. If they say that they are not able to write you a _strong_ recommendation, then go with the pro letters.
@"J.Thomas" yes, you can purchase now and use later—just write "Résumé Special" in the subject line when you get in touch. And yes, you can upgrade to consulting for $2585.
Thank you CantGetRight! The problem I had with my consulting service was actually not about them selling me short. But your perspective nevertheless is valuable to many on this forum. Thanks again and good luck with your cycle result! :)