Need to replace the front discs and pads over the next couple of months. Can anyone advise the size of Torx socket I'll need to remove the calipers (2004MY Aero)? I found out the hard way that they were Torx last time they needed replacing - got everything half stripped out & couldn't get the calipers off, the older 9-5 had normal hex bolts.

And I will be using DS2500s again - brilliant pad, for both long life and stopping power. The current ones have covered about 40,000 miles on an Aero Auto estate which I think is pretty good. They've got perhaps another 10,000 miles in them but the discs won't last that long so I'll need to replace them. Where is the cheapest place to get them ATM? TIA.