There probably is - me!
I'm considering replacing my Lite On LTD-163 DVD-ROM (Dell OEM) with a Lite ON SOHC-5232K combo - it would team up with my NEC ND-2500A DVD writer, and my Plextor PX-W1210TS SCSI CD-RW (used mainly to write audio CDs).
I've finally tracked down one supplier that sells black SOHC-5232K drives in the UK - see http://www.computerdoctorservice.co.uk/products/optica.html. However, the price is really a more than I'd like to pay (GBP45 - I can get a ND-2500A for around GBP60), and I don't need a retail kit (I already have more than enough screws and cables, and I also have a bought full copy of Nero 6).
I'm also worried by the 'bulge' in the bezel. My Dell Precision 650 has a drive bay door that that bulge would probably prevent closing. The OEM Lite On DVD-ROM has a totally flat face, which works perfectly.
There's very little information to be found about the Samsung. I'm no great fan of HL-DT-ST drives (though there is the GCC-4521B). There's also the Sony CRX-320E (which I suspect may be a rebadged Lite On, but I'm not sure - if anyone can confirm that, I'd be interested).
It seems that combo drives are disappearing from the marketplace - which is a shame, because they tend to be better CD writers than DVD writers are.