Word, Excel, Firefox, Safari, Chrome, Preview, Messages, Adium, and Parallels (Win7) is my usual stuff. Generally it works fine. I'm generally not using all of those apps at the same time, so a little paging isn't the end of the world.
----------
Sure, for some people, it is. The only thing I'd ask is whether you actually need that 6GB of dedicated VM RAM. A lot of people tend to over-dedicate RAM to their VMs when it isn't necessary. Not saying you do, but it's a common trend.