Which dvd blanks to use on a philips dvd recorder

Wonder if anyone could answer this query on behalf of a friend of mine.
He would like to record his own DVD’s
His DVD rewriter is a philip’s D28 DVD+
He would like to play back on a philip’s multi regeonal player which happily plays both VCD’s and Super DVD’s.
He’s also looking for a cost effective brand and disc type.
Any help or pointers really appreciated.
sorry if anything does not sound quite right i havent a clue on this matter and i’m simply reading off a piece of paper.
Cheers
Floyd:confused: :confused: :cool: