I wouldn't pour cash into it
The sim is not what people hear it to be. "This is as good as it gets..." is a slogan that could well have been written by a politician. It basically means take it or leave it whereas some people think it means so good that pilots cannot tell the difference. I do have FS2004 on my PC but only one add-on, the B737-600/700 because I like short flights. Every now and then I have a bit of fun with it especially with the young relloes and of course every prezzie I buy has to be thoroughly tested first (ahem). If you are sure you can't go further with flying then may you go far with the PC and enjoy. Only save yourself cash I'd say and keep the rig simple, forget the frills. You might enjoy procedures or love it when faults develop or try inverted under the Harbour Bridge. I wish you lots of fun and if anyone wants to know what I'd like for my birthday- the Spitfire package please!
Best Rgds
The "E"