Everything synergy said is true, but a couple of caveats.. for me, speed ratings are academic because 1x media is cheaper than everything else, unless you need your dvd a few minutes sooner, or you're doing massive amounts of burning, speed should be academic for you too.
Also, I have never had a reason to want +R; -R works great in all the dvd players I've tried, includng PS2/XBOX. The burner has been rock solid for me, never had a problem.
On a side note, I have heard terrible things about buyxtremegear, which according to some reviews on resellerratings have changed their name a few times because of terrible consumer ratings.