Hd or blu-ray on vlc player

I have a p4 1.8 ghz 512mb ram w/ a decent video card. My vlc media player skips on hd 720p movies sometimes and won’t keep up w/ bluray at all. Will upgrading my lan speed to 5mbps help or do I need more ram, faster processor, etc. What about for keeing up with streaming hd.

I’d say you are border line on performance. For HD, you typically need a 2+ ghz dual core cpu. And your RAM is too low, even for XP.