A few days after the HP oem release of th model there now is the original drive.
DVD +RW PHILIPS DVDRW824K DVD+RW
DVD Write 8X, DVD ReWrite 4X,
DVD Read 12X, CD Write 24X,
CD ReWrite 10X, CD Read 40X,
Looks like the first Dutch stores got this DVD+R(W) only burner.
Price here in Holland is arround 195 euro's for the retail version which is a bit expensive for a +R only drive I think.
Also the Benq version(BenQ DVD+RW DW800A 8*4+ 121040) has shown up on the Dutch pricelists but so far there aren't stores which have it so I think it will be there in a number of days.