dvd-r,dvd-rw or dvd+r,dvd+rw?

[doctorB]

I'm looking for an EXTERNAL dvd writer to burn my home digital videos. What type should I get, dvd-r/rw or dvd+r/rw?
I use a ps2 as my dvd player. What are the advantages and disadvantages of each?

If I go with dvd-r/rw, what drive do you recommend? What about the Revo Cyclone DVD external firewire drive?

If I go with dvd+r/+rw, what about the HP 200e dvd writer?

Thanks in advance,
doctorB.

ps Sorry about so many questions in one post!