The front rotors have been machined, which they reportedly do not like, so i am seeking a new set.
The prices seem reasonable on ebay, but, drilled and slotted or not is the question?

Like these
Drilled Slotted Jaguar XJ6 X300 3 2 4 0L 94 97 Front Disc Brake Rotors RDA98D | eBay

Madgaz

 

What do you mean "reportedly don't like"? If they are still within thickness spec, they are fine.

 

I bought some nitrac grooved and EBC yellowstuff pads much more fade resistant on track than standard aftermarket parts. I was advised against drilled for hard use. Better to buy from a reputable local firm than Chinese eBay specials