Definitely agree with AG->MM->TT->DDG->VRC->PSJ
And then, depending on how much you're willing to spend on 3rd party materials, Manual of Adventurous Resources: Complete, Paranormal Power, Spells from the Forgotten Vault (which are the three 'big releases' in 3rd party space so far)... and then just everything everyone has ever written in the 3rd party space after that.
And then, depending on how much you're willing to spend on 3rd party materials, Manual of Adventurous Resources: Complete, Paranormal Power, Spells from the Forgotten Vault (which are the three 'big releases' in 3rd party space so far)... and then just everything everyone has ever written in the 3rd party space after that.