Some have reported that non-OEM pads eat up the rotors more quickly. I have only used OEM, so I cannot report on this.
Keep in mind that with the rear caliper, you do not need to remove the caliper to replace the pads.
This spring I removed all three calipers, blew out the pistons, replaced the seals, and cleaned everything well before reinstalling with new pads and changing the fluid. There was a lot of crud in the calipers, particularly the rear caliper that probably wouldn't have been flushed out just with bleeding. Just something to consider on your 10+ year old cycle.
ok if i dont take off caliper does that mean the plunger in already depressed so pads slide out/in or do i what