No worries, I put a set on my previous WRX from there and they were fine - delivered next day too.
Technically, we all have drums at the rear even if we're running 360bhp (though, the drums do only do the handbrake on the XT and STi... you do have 10 gears though with the low range box, compared to NDS' mere 6 so at least you trump him on that one! :biggrin::N_poke:
If the discs were only done 18k ago, they should be fine so may free a bit of cash for pads, but TBH, new pads, properly bedded in should show some improvement. Brake fluid for fronts and rears come from the same reservoir so sounds like it's reasonably fresh... no harm in changing it though.
NDS, interesting re the YellowStuff pads... might have to give those a try once I finish off the Redstuff pads.