For new cars the Kia Soul, Scion xB, Honda Fit, and Nissan Versa are the roomiest cars you can buy for $17000. Avoid the Corolla, it's $3000 too expensive, boring, and too small. The Soul and xB are tall and boxy, so they have lots of headroom and large seats. The Soul comes with a 10 year warranty and costs $17000 fully loaded. The xB has slightly better quality that the Soul, but a much worse warranty and higher price. The Fit is very practical, but the seats are better for shorter drivers. The Versa is a small car with tons of space inside, but it's CVT transmission is weird and it could use some extra power.
Used cars make more sense. The Ford Taurus/Five Hundred and their Mercury twins are also good used cars. The Five Hundred was introduced in 2005, but was criticized for it's styling, low power, and lack of stability control. In 2008 they restyled it, gave it an extra 60hp, and made stability control optional. The Subaru Forester or Outback are also great used cars. Subaru has the best quality and reliability of any car company. Subaru's also have lots of headroom and good seats.
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