I am looking to replace my current system (P4 1.8 with 1 Gig RAM).I have three possible scenarios...I go for the Intel Quad Core and spend the inflated prices.I go for Intel Core 2 Duo and spend medium level prices.I get a budget system with AMD 4000+ and get a decent Vista Ultimate compatible machine.I do not exactly play games. But do some video conversion for my portable media player and run tons of memory intensive software at a given time...What would you suggest.