Ok here's an update so give me some input on this please. My budget is 300 bucks for ram, processor and motherboard. However let me know if you think i'll need a larger power supply over what I currently have. My video card is a 9800 GT energy efficient version.
I play games sometimes (not as much as I used to) so the focus now is less on graphics power and more on a responsive quick computer that can multitask well. (quad core should help with this correct? and should I go for 6 GB of ram or is 4 enough?)
Here's the potential upgrades (mostly just copied from someone's recommendations in another thread)
Newegg.com - Computer Parts, PC Components, Laptop Computers, LED LCD TV, Digital Cameras and more!
Newegg.com - MSI 770-G45 AM3 AMD 770 ATX AMD Motherboard
Will these new parts work with my currently existing things I won't be changing? (Case, HD, video card, sound etc)
Will I need a new larger PSU?
Is this the best I can get for around 250-300 dollars? Thanks for the help