Yes, you can still buy DVD ROMs, but there's no reason to. For a few more dollars, you can get the burning capabilities. I've got dual burners in all of my PCs, except for one. I've got one PC that just has a single burner. You'll have no problem with dual burners.
I've had good luck with LG, Lite-Ons, and Optiarcs. You don't see drivers on some sites, because you don't normally need a driver. The default windows driver will work to recognize the drives.