Pagid pad source and recs.

[TM]

Hi listers,
I am in need of replacing my rear brake pads soon and need some
help finding a good source for the pads as well as recommendations
on a good pad for the rear brakes.

The application in question is a '91 200q20v, with the thicker,
20mm vented rotors. I was told the pads for the rear calipers are
pretty much all the same- is this true?

Any recommendations? I was thinking about going with Pagid 4-4 Blue
pads, but if someone would like to chime in on whether that is a
good or bad idea, I'm all ears.

Also, what about the following:
Porterfield R4-S
Hawk HPS
Performance Friction
Weston Cool Carbons

The brake pads need also to work well with the Porsche brake upgrade
that is upcoming and I would like to use similar pads in the front
as well.

Is it a good idea to use a more aggressive pad in the back as it does
not work as hard and also to help equalize the difference between big
Porsche calipers in the front and stock in the back?

Thanks,
Taka
'91 200q