Here are a few of my favorite screenshots from my last few flights in the PMDG 737 NGX. I just bought it a month ago and I can't recommend it enough if realism and fully modeled systems are what you're after. It's worth each and every one of the 11,498 pennies! I'll also put a plug in for Ultimate Realism Pack. It really transforms the look and feel of the sim without any performance degradation.
Cheers!