+1 for the Strike Fighters series, if there is anything on par with the old Janes games, it's these sim(lights). The only F14 Tomcat sim around really too, if that means anything to you, although with various Falcon mods there are F14s to be had I suppose.
As for BMS, I would argue that it is even more complex than DCS in some ways, although IMO current BMS and A10C dedicated DCS are probably a toss up in terms of complexity/good times.