Man... tough question!
Arita is Ritek's "B Grade" brand, so it'll always be a lower grade disc then 'A Grade' Ritek.... but on the other hand you have Prodisc, which also leaves a lot to be desired!
Well, I'm going to be the odd man out and say Prodisc, since their DVD+Rs usually are a lot better then their DVD-Rs, you shouldn't have any problems I expect. As for Arita, some of their media just doesn't work sometimes.... I had one Arita CD-Rs that was missing spikes of dye spinning out from the centre of the disc... obviously it didn't burn properly, but at least it looked cool
