would I use the original GD-ROM disks that I own?
No, unfortunately the vast majority of CD-ROM drives in PCs can't read original GD-ROM games. You'll need to either rip the games using a dreamcast and serial cable, or download the games from a website like ours here. Based on the specs you posted you should be able to emulate most DC games at good speeds.
Quality wise yes, generally speaking an emulator output to your computer monitor will look much cleaner than using RCA on say, a CRT (I assume that's what you have).
"I think that the problem with this video is it is highly derivative of many popular bands within the genre. Although when viewed on its own merits, it does have a deeper groove. However what it has in groove, it lacks in originality. One can't help but be reminded of such bands as Pearl Jam, White Zombie, Suicidal Tendencies and other bands that bear the mantle of so called "Alternative Rock". One is even reminded of Lorie Anderson when she wore curlers. Hehehmhm! This video speaks less to the heart and more to the sphincter. In closing, I think Korn would do well to learn more from -"