Ati's Radeons (7500 and higher) have the best DVD de-interlacing technology for PCs, as well as awesome TV-out.
I use my computer as a DVD player attached to my TV with a Radeon 8500. The quality is impeccable, I highly recommend them for this sort of thing.
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<b>Radeon <font color=red>9500 PRO</b></font color=red> <i>(hardmodded 9500, o/c 322/322)</i>
<b>AthlonXP <font color=red>~2600+</b></font color=red> <i>(o/c 2400+ w/143Mhz fsb)</i>
<b>3dMark03: <font color=red>4,055</b></font color=red>