I that is the already machined finished size they will be ok for at least one set of pads and depending on how you drive and klms you do could get a year or more out of them.
Then you will be up for new discs depending on if the pads gouge the discs or not.
I've done 5yrs and 39,000klms on my current set of pads, genuine AP 2500's pads.
For the price you can buy new rotors, why bother with machined. I have slotted, and dimpled rotors on my GTS. EBC Red pads as well.
Once bedded in, they are great.
Bendix are good pads as well. I usually use Bendix, but the EBC came with the rotors.