USA Today thinks it's the new Accord Hybrid.
Highlights from the article:
Accord hybrid the best one yet
Each new gas-electric hybrid model leapfrogs previous ones in refinement, power, familiarity. Predictably, then, Honda's 2005 Accord hybrid is the best so far, by far.
The Accord hybrid, not on sale until December though gas-power '05 Accords are already at dealers, can claim several firsts or bests.
It has the biggest gas engine — a 3-liter V-6 — yet mated to an electric motor to create a hybrid. It's the first hybrid more powerful than the gas-engine equivalent: 255 horsepower vs. the gas V-6's 240 hp. It's the first hybrid that shuts down half the engine's cylinders under light load to save even more gas.
Full article here