I faced the same decision recently, and one thing that helped sway me was the warranty: 100,000 miles for the vibe, 30,000 on the matrix. I also liked the vibe style.

Does your company offer you any options? Can you decline the company car and get a mileage reimbursment instead?

Let me begin by saying that these forums have been a huge help to me in the last few months. I got my new vibe about a month ago, but started looking into one many months ago and this site was a big help. I finally ordered a 2007 moonstone with 4 wheel ABS, stabilitrak, premium sound, side airbags, ...