A couple of months ago, a Plextor drive was listed as the #1 buy for CD-RWs in PCWorld magazine, so my guess is that their CD-ROM drives would be good, too. You might dig a bit and see who actually makes their drives; sure it may say Plextor on the box, but I'll bet that someone else manufactured the drive.
For instance, I just bought a Buslink 48x24x48 CD-RW at Best Buy and it shows up as a Lite-On drive in the BIOS and the Device Manager, just like the Sony CD-RW I put in my stepdaughter's computer. The CD-RW it replaced was branded as Pacific Digital, but it's really a Samsung drive, so there's no telling who's hardware Plextor is putting in the box.
You might also consider taking our friend Mr Flibble's advice and getting a CD-RW because they're so cheap now. The aforementioned Buslink drive cost me $70 (USD) out of pocket, but it came with $50 in rebates. I've also seen retail box CD-RW drives at
pricewatch.com in the $40-50 range, which includes shipping.
As for the drops in quality and service, the prices are dropping as well. Computer components are moving to the point where it is cheaper to replace something rather than fix it. If you pay $40 for a CD-RW and it lasts you for two years, you're getting your money's worth. Four years ago, a comparable top of the line drive may have lasted for five or six years, but you'd probably have paid $200 for it and it would have been 1/10 the speed.