I like both the Fit and the Mazda5, but neither is quick and I'm not sure they can carry a seven-foot-long object. The Mazda might be able to.
Only minivans and largish crossovers can fit a seven-foot-long object behind the driver seat. If you don't need the front passenger seat, these fold on some vehicles.
Fast compacts with folding front passenger seats include...
Chevrolet offered the compact retro-styled HHR with a 250-260 horsepower turbo engine through 2010. Reliability isn't great, but they offer a rare combination of quick acceleration, compact dynamics, and cargo space.
My wife used to have the similar Chrysler PT Cruiser. I carried seven-foot bookcases in it with the hatch closed.
Various fairly quick Saabs, Volvos, and VWs (including the Tiguan) also offer this feature. reliability isn't a strength with these either, though, especially not once they're available for $12,000.
For better reliability than the above, you might check whether the Pontiac Vibe and Toyota Matrix have enough cargo space. They're fairly quick when powered by the 158-horspower 2.4-liter engine (offered in top trim levels, GT in the Vibe). The 2003-2008 version was offered with a high-revving 180-horsepower engine, but possibly only with a manual transmission.
If you want a seven-foot cargo floor behind the driver seat, then ignore all of the above except possible the Volvo V70 wagon.