 I currently have a Hyundai Sonata and when I wanted to replace my wife's car, I looked at the new Sonatas.  The way I wanted the car equipped (the new 4 cylinder and not the V6), Hyundai did not make a Limited with just the 4.  In addition, I felt two things about the new Sonata, were below par.  The first being the side mirrors.  They are fixed, and cannot be folded back.  The second is the display for the automatic air-conditioning system is much too small.  The Optima allows one to purchase a fully loaded car and have the choice about the engine.  The new 2.4 has had great reviews and now has a timing chain vs. a belt. 