There's only two great accelerators- YC and Techstars. The falloff after that is ENORMOUS, even just going to #3, #4, and #5.

If you go out of the top 5 accelerators, you're dealing with everyone who wasn't good enough to get into a respected accelerator. Doing an accelerator that isn't in the top 5 is a mark of incompetence- it filter for the desperate who couldn't

a) Get into YC/TechStars

or

b) Build the business on their own