Hello, I will begin with- I am no computer genius! We have a home based business and are looking to upgrade our old computer (7 year old to be precise). In our work, speed is key. we bid for jobs and have lost out due to a slow computer, prone to freezing up. I also do our paperwork (filing invoices, emails, etc) and I am wondering what will give me the speed and storage i need- dual core or the i5? I am looking at 1 each of these. The dual core is nearly $200 cheaper. From my earlier statement, you can see whatever we choose will be used for a LONG time. Which way should i go?