mine is a pretty good one and i think it takes both, although i remember dvd-r caused problems once so i tend to use + r's. just depends what player you have. as long as it wasnt too cheap it should be ok
ok so both depending on what dvd player you have but dvd-r for others and dvd+r for some. think ill toss a coin then
EDIT: what manufacturer has the best value? i was looking at TDK but they are a little expensive. also i was reading something about manufacturers using a certain dye in some of them which works good in conventional palyers