i use basf/emtec almost exclusively now, but also used quantegy in a pinch. i never use dds, as they are not made for audio dat, and i am afraid they will mess up my tascam da20mkii
i have been getting my basf's from oade. they are a little more expensive than dds, but worth it in my opinion.
the dds vs audio dat has always seems to been a heated debate on oade board
since i am recording audio, i will stick with audio grade dat tapes
ymmv
chris k