LC, The advice that has been given previously is as usual for this forum i.e. Sound and reliable. With regard to the Connie which is one of my very favourite aircraft I would highly recommend the various variants (including military) from L749 to L1649 done by Manfred Jahn. If you search on Flightsim.com under Manfred's name you should find all the major files plus lots of repaints. Although the models are basically FS9 they all work quite well in FSX and from memory with the exception of the L1649 Starliner they all have a VC. Personally I have converted all the textures to DXT5 and taken advantage of FSX's facility to have a common textures folder in order to reduce overall file sizes. Also slaving the panel between variants makes file sizes smaller. Although the aircraft does not come with a sound pack there are several good ones available.
Additionally as you have been told the recently released native FSX Just Flight (Aeroplane Heaven) Connie is also very good and has two separately downloadeable add on packs with additional variants not included in the main pack. Being a Connie fan I had to have this set too.
I would also endorse the comments re Classics Hangar's FW190, it is a brilliant model, up there with RealAir's Spitfire and if you get it now then start with the "Late Variants" pack as Mathias is currently updating the "Early Variants" to the standards of the "Late" one. The early variants was very, very good in itself but Mathias has raised the bar even higher with the "Late" one. In any case I understand that purchasers of the "Early" variants will be entitled to a free update when the revised pack is released (hopefully in February).
Best regards,
raptor 19 (JohnN)