Heatblur's brilliant simulation of the F-14 for DCS World is currently free for the next week or so, worth having a play if you own a flightstick - the level of detail is unbelievable.
The Tomcat is an absolute beast, though, so be prepared to be reading an instruction manual just to play a game if you want to go all out.
Also, to anyone who goes on DCS multiplayer for the first time: IFF IFF IFF.
Beware though, this addiction leads to things like buying entire hotas setups from companies like Virpil and VKB and that's a very pricey proposition.
In short, increasingly well modelled but ultimately only an abstraction due to some fairly obvious reasons. The JF-17 apparently has the best IFF model in the game but I only started flying it yesterday.