IMac or Lenovo IdeaCentre B500?

I know, I know, there are a lot of PC reviews out there. But I'd like to ask the opinion of users ... and not necessarily tech geeks, 'cuz I get lost when I hear chipset or graphic speed. I've read some of it, but most of the "reviews" I've read look like paid marketing pitches from either camp.

I just need it for business purposes. Aside from word processing, there's lots of the creative stuff that's going to be done (video editing, sound editing, Adobe Photoshop activities) with it.

I'd like to hear from people who are using any of these two products.

If you can give me pros and cons it would be fantastic (minimize geek speak though, caveman language is welcome, hehehe).

Thanks.