The Acura TL is the best blend of luxury and performance that you'll find at this price point. It has outstanding power for a sedan with a wide and very drivable powerband. It had a beautiful, well finished interior. Especially so in the two tone color combinations. The seats are very comfy and supportive enough to keep you from sliding too much during agressive driving. On top of all of this it maintains good fuel economy given its power. Only downside has been the 6 speed manual gear box which is occasionally fickle about going into 3rd on quick shifts. Though reportedly this can be dealt with by using a different gear oil. Overall I think its a top runner in a very competitive class.
I love the memory seats. Very cool to be able to have it always go back to your setup after valets, etc. Bluetooth handsfree phone is great. The Xenon lights are another thing I couldn't live without anymore.
A better display on the non navi cars would be nice. A dot matrix display would be much classier than the old school's display on them now. I wish it had an aux input to route my mp3 player into. Cupholder should be offset from the shifter. Tall cups can get in the way of shifting the manual.