I think the answer is pretty obvious by now; FSX is absolutely crying out for a good 747 Classic; start with the 747-100 and bring in the -200, -300 and -SP as additional models. Given the amazing job CS have done with the L1011, 707 and 737 Jurassic I think that the 747 Classic is a no brainer really. Let's face it, aren't there enough generic twin engined boring FMC equipped aircraft available from a range of vendors at all complexity levels to keep everyone going for a while? All there is 747 wise is the very expensive -400 from you-know-who, and the depressing -200/-300 version available from CLS via another company which has nice exterior modelling but a VC that looks like it has been produced with MS Paint and a default FSX autopilot.

C'mon guys, get modelling and take my money!  ;D