To be honest, I think covers tend to be one of PWG's weakest areas. Most of them are just a bunch of wrestlers thrown on a cover and some random background. They have improved recently though. Ones that really stood out to me:
Zombie's Shouldn't Run
Smells Like Steen Spirit
Card Subject to Change II
DDT4 2007 Night 1 and 2
A lot of the BOLA's tend to be above average as well.