Choosing Between DVD+R and DVD-R?

Pieroxy asks: "Most people like to make the analogy between DVD+/-R and the old VHS/Betamax/V2000 battle. This analogy is not applicable here, because whether you choose DVD+ or DVD-, you burn DVDs that are readable in most existing DVD players. Even if you buy today, the burner based on the technology that will die tomorrow, all your DVD*R will be readable in most DVD players. That said, what other argument than technical superiority can drive your choice? We know the DVD-R compatibility on existing players is better than DVD+R, we know that DVD+R as well as DVD-R have dual layers plans. What else can help me choose between either format? Are prices that different? Reliability? Speed?"