| ALways change pads when replacing disks as they should wear to shape to suit.....
I found on my car every other time I change the pads I needed new discs too. Discs wear pretty quick these days since asbestos pads were banned and manufacturers increased service intervals......
Check on the GTT forum on here. I bought GTT spiroslot discs and pads last year and they are brilliant - a good improvement over standard and I dont remember them being more expensive than OEM ones. | 
