I actually just replaced my Plextor 121032s with an LTR-52327S. I really
miss the SCSI because of the way an IDE drive can affect system performance while it is in use, but the speed at which I can burn CDs, now, far outweighs that drawback for me. It also sped up my boot time because I don't have to wait for my POS scsi adapter to scan each ID.
All in all, the Plextor was a great piece of equipment. Honestly, I don't recall a single coaster (oh, I'm sure there were at least one or two, but I don't remember them).... As others have mentioned, though, new drives have a few useful features that can help things along when ripping music, creating images, etc...
I'd sell you my old plextor cheap, but its in my wife's computer now.