Core i5 is the latest “mid-range” processor by Intel. A step up from the Core i3, i5 processors will give you a noticeable difference in speed, depending on what type of applications that you run. If you are playing solitaire, you aren’t going to be able to tell a difference between Core i3 and Core i5 processors. If you are editing multiple files in Adobe Flash, with virtualization software, you may notice the Core i5 to be snappier.
Should you buy a computer with a Core i5 processor? In most situations, a Core i5 is a safe bet. Core i5’s offer enough performance to do stuff like video editing and gaming, and more than enough performance to do basic stuff like word processing, internet surfing, and email. A Core i5 processor is a great, mid-range priced processor for people who use their computers frequently and often multi task.