Can someone let me know the upgrade option available for me as my requirement ?

Hello Everyone,

I have a iball designer PC and I can see this in my system properties :-

Intel core 2 duo e7500 @2.93 GHZ 2.93GHZ

Can someone let me know a laptop that will have same or better configuration (Dell,Lenovo,Asus is preferred).

All of apps I run currently in my computer are work fine as needed now (i have 4gb for now).

This system I bought in Feb's end this year. Do someone help me to know how I can upgrade it for perform better.

I have 4gb ram (64 bit windows web server OS) and 500GB hard-disk in my configuration.

Thanks