HELP! Best cheap "data storage" DVD-R's 4 Sony DRU

[knh4]

I've recently bught the Sony DRU-500a, n I have got loads to back up. Could some1 plz tell me which cheap DVD-R would be best to buy. I have seen the Bulkpaq gen 3 version 2/gen 4, they seem to be pretty cheap, but I am not sure whther or not my Sony will write to em. If my Sony does then it would be great. Could some1 plz help, n let me know if it would write Data. As 4 DVD-Video, I use Verbatime and TDK+R, so that is not a Prob, n Datawrite 4 PS2. N e help would be greatly appreciated. Thanx in advance.