The Brembo Sport drilled/slotted rotors are great, but for the price, they'd better be! The advantage to them, apparently, is uniformity of construction and perhaps a slightly different material than normal - this SHOULD make them less likely to warp, and help them dissipate heat a little better. Are they worth the price? Who knows...
We've had good experience with the cheapest rotors we could find - the "Ultra-8" from
Altrom, which are about $100 CDN (plus tax) for all four. They are cheap enough that you could justify cooking a set completely for a weekend at the track, and they have not warped, cracked or had any kind of unusual wear for us over 40,000 kms of street use.
For track use, I would consider having them cross-drilled by a reputable racing shop, but make sure that they properly radius or chamfer the holes so they don't chew your pads to bits! Out here on the left coast, I have had
Hyperformance recommended to me by a local tuner. This will obviously add a bit to the cost, but even if they charge $200 CDN, you'd still be coming in $100 under what the Brembo rotors will cost you.
On the subject of pads, we have used
PBR Metalmasters (listed on PSITuning, and also available from Altrom dealers) for the past two years. My only complaint is a lack of feel - other than that, they've been good. For our next upgrade, I'll be using the PBR ULX Ceramic pads ($120 CDN for all four wheels, so a wee bit cheaper than the Akebono), which are supposed to be even better performing, with better feel, but with slightly more brake dust.