hello tatala, welcome to CDRLabs.
Verbatim DVDs are generally considered as some of the best and they're readily available in many places both online and Brick&Mortar stores.
DVD+R or DVD-R: it doesn't really matter.
+/-RW are generally considered less reliable that +/-R.
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
M.C. Escher - Reptilien