With +r and -r even cheap bundles seem to be ok. If oyu plan on using +/-RW be more selective. A friend of mine has burnt over 100 DVD -R with whatever he got the cheapest with no problems.
I had a hell of a time with the same model lite on and finally returned it. Sent my buddy the media and it worked fine for him. I now assume my Lite on was defective.
have to think of more then just coasters when burning ... you want a media that not going to break down/decay faster either as some cheaper kinds can do. i've heard of some that "flake" as well. so i would say use what you want but make sure its made in japan