IMO, the 737 is a much better bird than the 777. I find it to be a much better product. I am not saying the 777 is bad, because it isn't -- but it is far from perfect.
I enjoy flying the 737 a lot more, especially handflying it. I find the 777 to be a PITA to handfly -- anyone else notice just how high you must pitch the nose in a turn? It's crazy! 737 is a much easier bird to handle. Plus, I personally enjoy having more control over the systems than just flipping something to AUTO -- which, even then, some things don't work right. For example...half of the time, the 777's VNAV won't descend properly when I fly it. 737 works perfectly.
Maybe it's just me, but I have found the NGX to be a far better, more complete product than PMDG's 777. I hope SP1 can change my mind, because that's still $90 I'm missing from my bank account that I am not 100% satisfied with.
After all, new does not mean better!
Nate Guarasci