Most new drives canread write any and all of the major formats now. So yes, one drive would suffice.
But I, like a lot of other people, have 2 identical drives. The reson being because it takes considerably less time to do a one to one copy of a disc with 2 drives than it does to take an image of the disk onto your hard drive with one drive, then replace the CD and burn that image back to an ew CD, all using the same drive, that takes a bit longer...
Drives aren't expensive these days, so if you can, i suggest you get two fo the same drive, it looks nice (not having mis-matched colors and designs) and it will help in copying and burning
dragon