Look and see what the specifications are for your particular computer, to start with. And since this is something important I'd go with a name brand. I use Verbatim and have had great luck with them. They often go on sale. And if you check Office Depot online I think they have a very good two-day sale for other brands. I got the email yesterday so it may still be going today.

As to DVD + or - or both, I don't really know. I'm using DVD+R from Verbatim and they work fine. I think most of the more recent burners will burn to any of them these days.

SRS