Mac application, I can see more clearly what the core i3 or i7 performs. Why? Because Apple is pure and simple, so the inner brains show marvelously, their is no dementia after three years. - The maker (Dell or Apple most recommended) - Processor (Intel pentium is good, for broadband get AMD) - Speed of the computer very important - Make sure the operating system is up to date (Windows 7 or Windows Vista) - Features are to your liking - Screen size is all up to you - Bulit in wireless internet card.. - Up to date software (Word, Excel, powerpoint should be 2007) That should be it Source(s): Knowing what are you looking to do and what you expect computer to handle. Draft all your questions and go to local computer store such as Best Buy etc... and have the sale person read all your requirements and criteria, then they can give you free consultation and show you few options what they can offer with the budget constraint. You'll be surprise what you may walk away with what you don't know before you walk in to the store. When purchasing new computer I would look in to following: 1. The purpose for which computer is used for e.g. Software development, Graphics designing,gaming , multimedia or some other purpose. 2. My Old Software and New hardware Should be compatible. i.e i will go with a processor which do not allow me to run Win Xp 3. Supports many diffrent