A few more that you may want to consider:
Rick Piper - an awesome HS748 for short-haul turboprop work, and for ab initio training, his Chipmunk is just delightful.
The Wozza Harvard trainer is also fantastic. Simshed has just released a Grob Tutor ...
Restauravia Zephyr - no better way to learn how to trap aboard a French carrier!

Also from this fine crew is a great Mystere IVA fighter bomber, and an awesome Vautour bomber.
If you're into tubeliners, then the recently released Tom Ruth B727s are good. Also - the Opensky/FS Freesky has done a series of Airbus, Boeings, and Bombardier jet airliners. While on the topic of tubliners, the FS9 Sud Aviation Caravelle works nicely in FSX, as does the fantastic Yannick/Lavinge FS2000 Falcon 50, recently revamped for FSX. No, I didn't mistype that - a fantastic model first modelled in Sep 2001, still rocks today, with the great work of our own SOH painters and gauge experts that still takes your breath away.
There's a recently released Grumman Duck, if you're undecided between water and land ...
I'm not into aircraft prior to the thirties - but I seem to recall a German DR1 floating about somewhere.
that should keep you busy for a couple of hours ....
dl