Having purchased all the Flight Sims from FS '98 onwards, I think the biggest step-up was from FS 2000 to FS 2002.
I now run FS 2004, but FS 2002 still enjoys a slot in my hard drive when I need a reminder of just how good it was...

...!
For anyone with a low-end machine it can't be beaten....
...and for all those with a high-end machine....
...it's still pretty fantastic...

...!
LOL...!
Cheers all...!
Paul...cuddling his copy of FS 2004.....and FS 2002...!!
Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.