Gotta chime in agreement with Falcon 4, nothing tops it
I never thought much of LOMAC myself. The campaign is what totally killed it for me. I cannot stand canned mission campaigns in military sims.
If your looking for lite sims to jump into
http://www.thirdwire.com 's Wings over x series (Vietnam, Europe, Israel, etc) are fun little sims, but not very in depth.
As for DCS Black Shark, it also has starforce, and its a helo sim.
P.S. I'm surprised were even talking modern combat sims in here, I swear all I ever hear from this corner of Subsim is IL2 this and IL2 that and occasionally something about biplanes.