We wouldn't call the TSX a performance sedan. By a broader definition it's an enthusiast car, one with a sporty personality and good road manners. Ultimately it doesn't have the acceleration to make it to the biggest league (3-Series), but it's more than pleasant to drive.
Base cars make 201 hp from a 2.4-liter 4-cylinder; that's the only engine offered in the Sport Wagon, while sedans can reach upward to a 3.5-liter V-6 with 280 hp. Those 6-cylinders come with a 5-speed automatic; 4-cylinder sedans can be teamed with a 6-speed manual, but wagons are auto-only.
If you're looking at a sedan, look at the manual. It's one of the best reasons to buy a Honda. Their traditionally sweet shift action is on display here; the TSX has a light clutch, a precise shift linkage, and it all works brilliantly with the rev-happy 4-cylinder.
Ride and handling are European in the best sense, firm and composed without being too taut. The electric power steering is calibrated well, and has good weight.
We'd opt for the 4-cylinder in almost every case. The 6-cylinder wants to make more out of the well-tuned suspension, but the extra weight on the front end dulls the sharp feel of the TSX.