Best bang for the buck bar none for this type of car: 2003/04 Infiniti M45.
My fun car is a Z32, but like you I wanted plush 4-door and very comfortable and went with the M. If you look at the current prices, they are hard to beat w/ low miles, and every one of them has a 340 hp 4.5L. On the highway I regularly get 26 MPG (albeit only about 18-20 city). 0-60 was estimated by C&D at 5.7 seconds and I believe it (with a proper launch). They also handle very well for a 3800+ lb car. I also got through a Cleveland winter without issue with the winter tires I put on the car (and traction control on!).
It has stability/traction control (which can be overridden), brake distribution, lots of air bags, heated/cooled seats, and optional Nav (although they all have the screen).
I love the car very much! Also they are very rare with < 8k imported and only produced for 18 months.
If you think they are ugly, you aren't the only one, but I for one love the look.