DVD RW (either flavor) or CD-RW would be a tough call though.

I have a DVR-A04 DVD-RW and LiteOn 16x10x40x CD-RW in my main machine now (an Athlon XP2000+). I decided that I will toss the CD-RW since I rarely burn anything (thank you empeg). The DVR-A04 burns CDs at 8x (I think), so it's not a huge loss.