I have had the Pioneer 103,104 and 105, the Cendyne (105), the Cendyne (NEC1100a and 1300a) and the HP300i (NEC1100a). All have worked perfectly. I have always used Nero and DVdDecrytor and have produced perfect dvd's. ALso have used CCE-DVD2One-DVDSplit etc, again, all have worked as advertised. All of my produced dvds whether they be + or - have worked in my 6 players without a hiccup. Those being Sony-Panasonic-Apex-Pioneer and Toshiba.
My only gripe is that media that is -r that is advertised to work at 4x, won't always work at those speeds but +r that is advertised at 2.4x or 4x speeds will always work at those speeds in a +r burner. I am down to the HP and the NEC1300a (although I don't purchase -r dvd's anymore)
What ever choice you make is the right one. Enjoy yourself.