Also, is the i3 processor stronger than Dual core 2.4 GHz processor? It confuses me because the i3 has less GHz from what I read.
Also besides playing starcraft I want to edit and make movies. is i3 good for that?
I am a n00b at this stuff so thanks for the help!
The Core i5 450m is a little bit more powerful than the Core i3 that he Acer one has, but the difference in speed isnt too noticeable, as long as you keep it well ventilated/cooled, since the i3 will throttle itself if it hits its thermal envelope, which is about 10 or 20 degrees lower than that of the i5.
The new 'i' series would be reccomended amongst most of the older Pentium Duo processors.
Ranked in order you have the i3, i5 and i7. Most of them are duo cores but the high end i5's / i7's are Quad core.
Starcraft 2 was made to run well on any PC, so you could achieve low settings with any modern dedicated graphics card and run fine.
You may struggle to find a Blu Ray drive and a decent mid ranged Graphics card at those prices. At that price i would reccomend looking for an ATI 5650, that would run Starcraft on Medium 40 FPS+ and can be found in systems for that price.
I'll link ones i am familiar with in the American market since i'm British, but you'll get the picture on what to look for.