2X Accu Silvers have worked fairly well for me so far. Just finished a 2nd 50Pc cake and no PS2 coasters with my A04 at 2X with v1.31 2X4All firmware and RNM/DVDDecrypter.
Otherwise, I've used a lot of Verbatims and TDK's reliably--all 2X certified. Currently using some Verbatim Datalife's I nabbed on a big 2 for one sale at Office Depot a few weeks back. Good burns so far. Item#/UPC ends with 94490.
My 2 cents....
If it ain't broke don't try to fix it! But, hell if you can tweak that bastard just a little bit more....hehehe.