I always use CDRW's also, even back when all you could get was 4X. Verbatim has just come out with a 16X CDRW. They also have 10X, and TDK is marketing 10X in a 5 pack. Found them in stock at Target. The burners vary. Found in the manuals that the 8X Plextor will write CDRW at 4X, 16X Plextor will write CDRW at 10X, and the 40X Plextor at 12X. Still a heck of a lot faster than the 4X's I'd used for so long. Use them straight out of the pack also.
Many Karaoke players won't read CDRW, but I look for a change there in time. I sold a JVC 'cause it wouldn't, and bought a Sony CDP-CX400 which does, so I can see what my stuff really looks like on the big screen before burning to a cdr. The Phillips twin tray home deck that's in my Karaoke system reads and writes them also(at 1X), so I don't make any coasters when our club gets together to make recordings. We sing it, play it back, and if we don't like it, erase and do over.
All I gotta say is YEAH CDRW'S
George