...I've never been able to go more than 4000 miles without wearing a rear tire down to the wear bars...
Jeezus, 4000 miles from a rear tire? I'd go broke replacing two rear tires every four months. Maybe your tire pressure is too low.
I run Pilot Road 2s on both bikes, and I get about 12k miles from a rear and more from a front.
Brake pads...about 35k miles on the Bandit. I dunno about the Monster. I swapped out the OEM pads when I replaced the OEM rotors for Galfer Waves.