New car, soon?!?

It's becoming more and more painful to have one car! This conflict, that conflict, waiting for this ride or that ride, asking relatives to use their car...this is getting old! I thought that I could hold off on the second car for another year but it looks like this summer will be the moment of truth! We've been a one car family for a loooong time and have tried avoiding a second car by carpooling, bumming rides, and taking the bus...

Here is a quick list of potential second cars based on budget:
Honda Fit: (33 and 38 mpg) heard there is alooong waiting list :(
Toyota Matrix/Pontiac Vibe: (30 and 36 mpg)
Mazda 3: (26 and 33 mpg)
Kia Rio5: (35 and 38 mpg ...auto trans)
Saturn Ion: (~24 and 32 mpg)
VW Rabbit: ( 22 and 30 mpg) Why is this lower than the above?

Note: no hybrid due to high cost of acquiring one, even a used vehicle.