My fiance recently picked up a 5spd 2005 Pontiac Vibe during GM's clearout sales in the summer. While mechanically exactly like the Pontiac Vibe they of course have small differences, namely in option packaging, different exteriors, radios and slight difference in base price. I prefer the more subtle styling of the Matrix, but the Vibe during the GM sales event was an obvious choice = $4500 less than an equivalent Matrix. While shopping for 2005 Vibe models, pickings were slim at best towards the end of the sale.
While slightly weak on power and 'fun' it is marketed as an economy car and as such returns admirable fuel economy for its intended use. The interior (exact same as Matrix) is far from inspiring but we think it will stand the test of time well (durable). Dollar for dollar I believe you would be hard pressed to find more car for your money.
Chris