2GB is just fine. If you got 4GB then switching between programs would be a little quicker but working within programs would be exactly the same.
Unless you have a gaming system or some specific photo or video editing needs 2GB is just fine.
I also know what I'm talking about. I've used both 2GB and 4GB in Windows 7 x64 Premium. I found that 2GB felt just slightly slower when switching between programs. Spend your money elsewhere.
Thanks for your input. I was looking at the specs and it said that the 2GB RAM was high performance. Most likely, I'll never do things like photo editing, using my PC as a TV, etc. I just wanted to make sure I had enough RAM.