I would buy the F-4 in a heartbeat,should it ever become available,in fact I am very surprised at ED that they didn't make the F-4 as one of it's first priorities,it's iconic.
Re model choice,I would be very happy with a F-4D or F-4E this would fit very nicely with a Vietnam scenario,should we ever be lucky enough to get one,but I'm just dreaming here,lol.