I have an iMac that's about a year old. I also have a new PC that's slightly faster. I'm trying to figure out which one to use and which to sell. I had an eMac whose hard drive died after 5 years. The screen was pretty blurry and maybe a little dim by then as well. So, I'm wondering how long this one will last. If the previous white ones were built in a similar manner, how have they held up?