Well, for the record... Waves don't create braking power, they are for clearing out the muck easier which is what helps braking in mucky terrain. I don't know what you ride, but If you don't constantly ride where it's pretty mucky, then waves shouldn't matter much.
I don't know why slotted and drilled would make a whole lot of difference on a slow bike like the KLR. Not like KLR's are running 100mph all day.
The only thing that makes sense would be SS lines, more rotor surface and larger pads.
I'm always surprised that people are looking for more braking power. I can lock the rear up on demand and I know the front will lock up without trying much. Any more braking power for me and I'll just be sliding in to my stops.