This same question was asked on imdb's Daily Poll.
The results:
<TABLE>
<TR><TD>Dr. Strangelove
<TD>1173
<TD>(20.0%)</TR>
<TR><TD>A Clockwork Orange
<TD>1103
<TD>(18.8%)</TR>
<TR><TD>The Shining
<TD>1099
<TD>(18.8%)</TR>
<TR><TD>2001: A Space Odyssey
<TD>844
<TD>(14.4%)</TR>
<TR><TD>Full Metal Jacket
<TD>817
<TD>(13.9%)</TR>
<TR><TD>Spartacus
<TD>242
<TD>(4.1%)</TR>
<TR><TD>Eyes Wide Shut
<TD>206
<TD>(3.5%)</TR>
<TR><TD>Barry Lyndon
<TD>102
<TD>(1.7%)</TR>
<TR><TD>Paths of Glory
<TD>91
<TD>(1.6%)</TR>
<TR><TD>Lolita
<TD>81
<TD>(1.4%)</TR>
<TR><TD>Other
<TD>51
<TD>(0.9%)</TR>
<TR><TD>The Killing
<TD>45
<TD>(0.8%)</TR>
<TR><TD>Killer's Kiss
<TD>3
<TD>(0.1%)</TR>
</TABLE>