Hello, there!

This is my first post so I am not very familiar with this forum conventions. That is why I have decided to ask my questions in this thread. I am interested in quite sophisticated airliner simulation so as I think CS products are a good choice. However CS developer studio created many advanced add-ons for FSX and I am a bit lost which one is the best to buy now. In short I am looking for two types of airliners:

- modern plane: 757 or 767
- classic passenger jet: 707 or 727

So I'd like to know which plane to choose in this two categories? I can add that visual quality is less important to me. I prefer good flight model and realistic systems simulation over eye-candy. Also less buggy plane would be my favorite.

Maybe some experienced users could help me here: Is 767 better than 757 and 707 better than 727 according to my priorities?