Per your request from the other thread:
I have not heard the DLS Iridiums but they receive a lot of positive feedback. I think they would be a serious contender.
You might also consider this set of Rainbow Vanadiums,
http://forum.elitecaraudio.com/showthread.php?threadid=114603&pagenumber=3
3.5Max6spd is the resident Rainbow guru and hopefully he will chime in on what he thinks of the Vanadiums.
Edit: Here are a couple of threads from a UK forum on the Vanadiums.
http://www.talkaudio.co.uk/vbb/showthread.php?t=64839&highlight=vanadium
See post #24 by Geoff B.
http://www.talkaudio.co.uk/vbb/showthread.php?t=89997&highlight=vanadium
See post #19 by Amit