If you are going ONLY for the drilled/slotted look (that's cool), than I suppose that this doesn't really matter. At least consider it, though.
Perhaps you know this, but plain rotors actually stop better than drilled/slotted. There is more surface area. The holes/slots are meant as a way for the gas that is generated under extreme conditions (brake fade) to escape. Thus, their advantage is resistance to fade. Basically what is typically known as fade, is caused from an overworked pad. The pad emits a gas and it gets trapped between the pad and rotor, not allowing pad contact. The most common type of fade is green fade. It's from a new (un-bedded) pad being overworked. Properly bedding your pads and seasoning your rotors will highly reduce green fade. That makes holes/slots not necessary for street use.
Drilled (vs. slotted) rotors are known to develop cracks easily between the holes. The rotor gets stressed from the drilling. Less surface area of all 3. Least braking power (assuming no fade).
Slotted will still vent the gas, and not crack easily. More surface area, more braking power.
If you want the look, be sure to get them plated to prevent them from rusting.
FWIW - I got the PPI kit for $399. Bought Russel stainless lines for 94-95 Cobra. PPI (at the time) only had RED colored stainless lines for upgrade. (I didn't want the red lines on my all black car.) I only didn't get the 13" Power Slot slotted rotors because of $$$$. Like $120 ea. The normal 13" rotors still look good (just because their big).
The PPI kit is well worth the money. Best value by far.
Baer's similiar 13" kit is closer to $600, I think. Comes with a new master cyl., though. I can't imagine a full Baer kit for $250... You sure?
Another upgrade option is to put the 99-up (01-up??) front PBR caliper on your stock rotor. (and a drilled/slotted 11" rotor?)
Rick