My 720p xorg.conf

# /etc/X11/xorg.conf (xorg X Window System server configuration file)

Section "Files"
FontPath "/usr/share/X11/fonts/misc"
FontPath "/usr/share/X11/fonts/cyrillic"
FontPath "/usr/share/X11/fonts/100dpi/:unscaled"
FontPath "/usr/share/X11/fonts/75dpi/:unscaled"
FontPath "/usr/share/X11/fonts/Type1"
FontPath "/usr/share/X11/fonts/CID"
FontPath "/usr/share/X11/fonts/100dpi"
FontPath "/usr/share/X11/fonts/75dpi"
# paths to defoma fonts
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/CID"
EndSection

Section "Module"
Load "GLcore"
Load "i2c"
Load "bitmap"
Load "ddc"
Load "dri"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "type1"
Load "vbe"
EndSection

Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc104"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ImPS/2"
Option "Emulate3Buttons" "true"
Option "ZAxisMapping" "4 5"
EndSection


Section "Device"
Identifier "NVidia"
Driver "nv"
VendorName "nVidia Corporation"
BoardName "NV28 [GeForce4 Ti 4200 AGP 4x]"
BusID "PCI:1:0:0"
EndSection

Section "Monitor"
Identifier "HDTV"
VendorName "InFocus"
ModelName "61MD10"
VertRefresh 30-90
HorizSync 20-150
# No clue if this is a good ModeLine to use
ModeLine "ATSC-720-59.94p" 74.176 1280 1320 1376 1650 720 722 728 750
EndSection

Section "Screen"
Identifier "HDTV Screen"
Device "NVidia"
Monitor "HDTV"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1280x720"
EndSubSection
EndSection

Section "ServerLayout"
Identifier "Default Layout"
Screen "HDTV Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection

Section "DRI"
Mode 0666
EndSection