This is what I have today:

Logitech Extreme Pro 3d stick, no pedals

Dell Optiplex 9010 Win 10 Pro

Device name    DESKTOP-KU7MCET
Processor    Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz   3.20 GHz
Installed RAM    16.0 GB (15.9 GB usable)
Device ID    1AFD3C1C-E4D0-4D6F-B7AE-59A50932B387
Product ID    00330-80000-00000-AA429
System type    64-bit operating system, x64-based processor
Pen and touch    No pen or touch input is available for this display

Just ordered a power supply as the stock Dell can't support a true graphics card.

Is this processor adequate if I add an nVidia Graphics Card? Or, am I going to need a new box altogether?

As of this moment I haven't even got the engine started on the TF-51D! So, I am decidedly not ready for an F18 and dog-fighting.

I am interested in the F4 Phantom and A4 Skyhawk

Maps interested in Israel and Vietnam

Any pointers and help would be appreciated

 

I think your processor and RAM should be fine on medium settings.DCS is very scalable with many graphics sliders/options to choose from.