I was window shopping at Newegg today and decided to look in on the optical drives. Their choices for internal dvd burners (full size, not slim drives) fits on one page. When you eliminate the clones and the one leftover Sony Optiarc that is soon to disappear, we are down to four drives.
LG GH24NS95 (OEM)
Samsung SH-224BB (OEM)
Lite-On iHAS124-04 (OEM)
And the selection amongst the blu ray burners is hardly better. If they didn't have retail and OEM models, we'd be even more constricted in choice at Newegg.
LG WH14NS40 (OEM)
Pioneer BDR-208DBK (OEM)
Lite-on IHBS112-04 (OEM)
I didn't include Asus since they rebadge drives.
Its a sad state of affairs. And from the little reading I've been doing on drives, there don't seem to be any outstanding dvd burners left. The blu ray burners seem to fare better in our informal user reviews/reports.