Ive been using a DVD writer for over a year m8 and although what john_ar says is true and the format will eventually change both for PC DVD and for domestic players alike, lets face it, thats gonna take atleast another couple of yeras minimum and to be honest the format of every single PC part is under constant evolution and theyll all change (memory, socket for cpu, etc etc) so theres nothing new in the fact the format will eventually change.
Now lets clear a few points up.
Any DVD recorder regardless of format (- or +) will record and read both CD's and DVD's. However a recorded DVD (infact any DVD) can only be played in a DVD player, so forget the notion of being able to record a DVD and use it in any old CD player.
Format : The best quality is +R but the most compatible is -R, typically about 99% of all DVD player read -R format and only about 20% read +R, the overall difference in quality is virtually non-existant unless you plan on making movie to HDTV standard (i.e cinema quality). For data theyre essentially exactly the same as they are for music too.
Nowadays most DVD recorders record both formats so its not even really an issue. I'd recommend you look at the new Pioneer 106 (same as A06 but non retail) as its a solid and very stable 3rd generation machine.
Any other questions fella just gimme a shout
P.S The NEC machines suck, stick with Pioneer, Sony or Plextor m8
