Replacing Optical Drive on I-Mac G5

Has anyone replaced their optical drive on their I-Mac G5. I need to replace mine due to problem burning disc. (sound issues, fading, muffled sound, etc.) Has anyone tried a aftermarket Optical Drive or should I replace with the original apple Optical Drive. Any input would be much appreciated. Thanks
I've never owned an iMac, but for the several other Mac computers I use OWC has been an excellent supplier of parts. At the bottom of the page is a link to installation instructions.
I had great experience with a company called Myservice. They send you a box for shipping if you don't have one, have quick turnaround times, reasonable prices and professional work. They work on all Macs for replacement parts and upgrades. Highly recommended.
I haven't had a need to replace an optical drive, but I've been purchasing from Other World Computing since the mid 90s. They're a great company that knows Apple products. $99 for a replacement seems like a good price.