I think everything from 42028 to 42038 isn't that helpful. That is why I talked about the hijack to the correct destination. It isn't really hijacked off to scanners. All of them may offer something.
I don't think 8GB is necessary, but like Sandeep, I have 15 browsers open, five programs and an antivirus program running in the background. Still only using 3GBs of RAM
There are four major things to look at:
1. Processor - i7 2600s are nice -- can probably use i5. Doubt you could tell the difference.
2. RAM - beteen 4GB and 8GB non buffered RAM for a desktop
3. Hard drive -- SSD, SSD, SSD, SSD (do you recall that time when you watched those little icons load in the system tray? Gone.) Never see them load again.
4. NIC card -- not wireless. Make it a Gb.