DCS graphics are excellent but feels like a military simulator. Immersive, functional, slightly spartan, not warm and friendly like FSX or X-Plane which is fine.
The virtual cockpit is superior. It appears every switch and button is working and actually executing its real life function. There are no military helicopters for FSX that even begin to approach this one in terms of complexity of avionics.
If all you want to do is fly around at your leisure without any objective other than to stay airborne then there are plenty of copters around that at least visually approach DCS + plus you can fly anywhere you want.
DCS is a so called study sim of remarkable complexity, profound even for a mere PC using mortal and you will not find it as satisfying as FSX if you don't put in the days or weeks (depending) getting acquainted with the extensive docs and tutorial videos.
FS9 & FSX running on Q9550 Quad @ 3 gHz, Nvidia 512 MB 9800GTX+, M-Audio Firewire 410, 2gb RAM, CH Yoke & Pedals, Top Gun Afterburner II, TrackIR Pro
X-Plane 9 running on Apple iMac 27"