You didn't mention the brand rotors, but there are a lot of CHEAP drilled and slotted rotors out there that there is NO WAY I would put on my car, unless it was just used for cruising. If you are doing any performance driving (especially track driving), I would stick with the big name comapanies. They are not cheap by any means, but cheap brake rotors getting to hot and cracking, warping, coming apart, etc, is not something I want to happen coming into 10A at RA. They may be good bling for the street though if you don't drive the car hard.
Some may disagree me, but I wouldn't even want the high end rotors drilled and slotted due to possible stress cracks around the drilled holes. Slotted or slotted and dimpled are fine, but drilled can cuase issues.
I know you didn't ask for advice on the rotors themselves, but I would hate for you to find out the hard way.
As for changing the rotors out, it's a snap (at least on my Gen III). The rotors are floating, so once you remove the caliper bolts and the calipers, they come right off. You "might" need a slight tap around the edges with a rubber mallet to break them free. I also agree with Viperless that you should go ahead and flush the old fluid while you're at it. I certainly assume you are changing the pads already.