Francois,
There are some really nice developments going on in the DCS World community now...
FC3 is a lot of fun, but the stand alone modules are where its at....
Although the stand alone modules can be expensive, they're worth every cent...
I've got the following over the last year or so...
UH-1, P-51D, F-15C, FC:3, A-10C, F-86F (there are some 'SAAF' textures out there)....
I will say this to anyone interested in the stand alones: if you're not prepared to spend a few days learning the aircraft systems buy FC: 3. I've had the A-10C for a good few months now, and still havent yet nailed the weapon systems properly.
The FC: 3 aircraft are 'dumbed' down, so that guys can jump in an go... in the A-10C, after starting up the aircraft... you must sit on the ground for 4 minutes for the NAV/INS system to initialize, as well as load weapon profiles into the DSMS (Digital Stores Management System)... if either of these steps are skipped, alot of things will not work for your A-10 and you might as well not fly.
FC: 3 is also the best 'bang for buck' of the lot... as it includes 6 aircraft (A-10A, F-15C, Mig-29, Su-27, Su-33, Su-25)... however, they are all the 'dumbed' down aircraft.
DSC World is a bit buggy, and the game does tend to lose the plot occasionally, but usually with some spectacular results....
Here are some screenies of the online flying