If you want to remove scanning lines, htpc is best. But if you are talking about deinterlacing artififacts with video mode, Faroudja DCDi is currently the best software chip, a htpc can't compete in this area for the moment unless you get a DCDi faroudja pci card. If your screen size is not overly big and you are using the 16x9 squeeze mode and can't really see scanning lines, a standalone dcdi player will be better.
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