looking for a comfortable ride?

i am looking for a comfortable and spacious car with good gas mileage. i want to get at least 20 mpg average.

cars like cadillac, buick, lincoln and else.

must be a 4 door and auto. leather, moonroof and heated seats would be nice. any suggestions..?

Check this out:

http://www.lexus.com/models/IS/index.html

$30K Lexus, 21-29 MPG, Leather seats and dash, and auto moonroof. 205HP V6 and 0-60 in 7.9.