Most players play DVD-R discs but I learned the hard way that only a few play DVD+R media. Here's a list I found. Do with this knowledge whatever you like. I found it to be invaluable.

BTW, TR47 disc sound great and look even better! You're all fighting the good fight...Believe it.

Apex AD-1500
Apex AD-500W
Apex AD-600A
Classic DVD-102
Denon DVD-3300
Denon DVD-1000
Denon DVD-3000
Emerson EWD-7001
Emerson DVD-2000
G.E. GE1401P
Go! Video DVS-3000
Go! Video DVP-850
Hitachi DVP315U
Hitachi DV-B305D
JVC XV-523GD
JVC XV-SB40BK
JVC XV-D723GD
Kenwood DV4050
Konka KD-1800U
Lasonic DVD-2100K
Memorex MVD-2026
Memorex MVD-2027
Microsoft(R) X-Box
Mintek DVD-2580
Mintek DVD-2110
Mitsubishi DD-4001
Mitsubishi DD-4020
Mitsubishi DD-3000
Onkyo DV-C601
Panasonic DVD-RV31
Panasonic DVD-A310
Panasonic DVD-RV30
Panasonic DVD-RP56
Philips DVD-621AT
Philips DVD-711/171
Philips DVD-611
Philips DVD-711
Pioneer DV-434
Pioneer DV-525
Pioneer DV-606D
Pioneer DV-05 Elite
Pioneer DVL-414
Pioneer DV-343
ProScan PS 8610P
Raite RDP-715
RCA RC5240P
RCA RC5215P
Samsung DVD-M301
Samsung DVD-611
Samsung DVD-N2000
Sharp DV-750U
Sharp DV-740
SMC DVD-330S
Sony PlayStation 2
Sony NS-400D
Sony DVP-NS700P
Sony DVP9000ES
Sony DVP-S670D
Sony DVP-S550D
Sony DVP-S300
Sony DVD -S560D
Sony DVP-NS400D
Sony DVP-NS500V
Sony DRU-500
Sylvania DVL-100B
Toshiba SD-2700U
Toshiba SD-K600U
Toshiba SD-9000U
Toshiba SD-3109U
Toshiba SD-2705U
Toshiba SD-9200
Toshiba SD-1200U
Toshiba SD-2300
PToshiba SD-3750
Toshiba SD-4700
X-Wave B171-L9
Yamaha DV-S5270
Zenith DVD 2000
Zenith DVD-2200
Zenith DVD-2201
Zenith DVD-2831