Try the Messerschmitt Taifun... It's been one of my favorite GA aircraft for a long time. Good, if not stellar, VC (Above average for freeware, at least), flys well. Vintage too, and has sorta a warbirdy feel without being one by a long stretch.
http://www.simviation.com/fs2004vintage18.htmCould try the Maule M-7, a great freeware package. Superb VC.
http://www.simviation.com/fs2004props54.htmA number of the Bill Lyon's Classics, particularly the Piper Apache, but also the Tripacer, Swift, and a few others. You can search for Bill Lyons here, but last I knew Simviation still lacked one or two of his planes... AVSIM or Flightsim.com would probably have the others. I'd personally suggest all of Bill Lyon's planes without a moments hesitation, even if you don't normally like flying the type of aircraft they are.
Piper Tripacer and Grumman Goose:
http://www.simviation.com/fs2004props80.htmBill's Luscombe 8, Piper Apache, and the unrelated but also good ZLIN Z-43.
http://www.simviation.com/fs2004props79.htmBill's SR-9C
http://www.simviation.com/fs2004vintage39.htmQuad City Challenger, maybe a little lighter than you wanted, but still good:
http://simviation.com/fsgliders_12.htmGlobe Swift:
http://www.simviation.com/fs2004props30.htm