I wouldnt buy anything socket 775. I have an i3, they OC to 4.0 easier then any cpu I have ever had. Im running 4.2. In benchmarks it out performs any stock quad core except i7 class. It is twice as fast as my e7500 @ 3.6. I just bought another one, Id be willing to give you a nice deal on it. I3 540 and a Gigabyte motherboard $200 even for the pair. New in box.
Thanks for the offer, but I'm not exactly technology proficient enough to build my own system
so I was just choosing from packaged desktops like Dell Inspiron series.
And yeah, i'm planning to keep it for >4 years and i accept that windows computers always slow down after a few years so i figured i should have a decent processor to start with
So i3 it is! looks like a good value for something that can overclock up to 4.0GHz.