Ok, so, after further thought, I don't anticipate using Sp Atk as much as reg atk, so it's more of a change of pace, to deal with people who aren't expecting it.
So this is what I'm thinking:
108 spe EVs
252 atk Evs
144 sp atk Evs
And I would think I should go with Lonely nature, but I'm open to a Mild nature if anyone thinks that Lonely would leave Sp Atk just far too weak?