I have vista if it matters and I didn't know where to post this so real quick which is better for playing backup dvds and backup isos DVD+R or DVD-R?

As far as your computer DVD, it shouldn't matter. It should be able to play both. But when it comes to your TV, that depends on the DVD player you own. Some will play both, some only play DVD+r. some will only play DVD-r. So for TV you should check your player...