pac aoem gm24 or loc

I am going to add an amp to my bose system in a 2004 Silverado Vrew Cab. I was wondering which would give me better SQ, the PAC AOEM-GM24 or if I should just tap into the wires going into the factory sub with a regular LOC. Or if there is a better solution short of ripping the enitre Bose system out and starting fresh, please let me know. I may eventually re-do everything but for now I am trying to get the most bang for the buck with what I have to work with.

Thanks,

Jason