Are you looking for an Ide or sata drive ? Slot-in or not ?
My only slot-in is a Plextor PX-608AL, which is a good burner, but is quite slow to recognize discs, and a bit noisy.
I can also recommend you the AD-7590S or 7590A (sata or ide), from Optiarc, which a good burner (assuming 8x max), and supports bitsetting via Liggy’s firmware. I got 2 of them (7590A and 7590S).
If anyone has other suggestion, I also got a Pioneer KD08, Matsushita UJ-850 and 870, and Samsung SN-S083A, but I have no time to test them seriously… For the moment I will only say that Matsushita UJ-870 is really quiet while reading and burning.
Please note that only optiarc and samsung are publishing new firmware (optiarc more often), for matsushita i’m still searching, pioneer and plextor too.