Check out www.alphasim.co.uk it's a payware site but they have a pretty decent selection of freeware. If they don't have sounds or panels then I'd try to find some on www.flightsim.com or www.avsim.com. As for payware www.a2asimulations.com has some really great titles, they're producing some titles with 'Accusim' which basically means ultra-realism, currently there's the P-47D Razorback, B-17G Flying Fortress, Boeing 377 Stratocrusier, and the J-3 Cub. All have the 'Accusim' expansions that you can buy and I strongly reccomend them if you like any of those aircraft everyone of them is pretty good inside and out. PMDG is another really good company which offers some really in-depth simulations of the B747-400, MD-11, and Bae J41, but if you get any of those make sure you have plenty of time to read manuals and learn how to program an FMC lol. Heres a screen of the A2A B-17G: