Given your stated interest in Germany's Kriegsmarine of WWII, I would suggest the Heller/Airfix line of 1/400 scale kits. The complete range of German capital ships and the heavy cruisers Prinz Eugen and Admiral Hipper is available, as well as one destroyer and many variants of Type VII and IX U-Boats by Mirage.
First, these kits are large enough to offer ease of construction and supplemental detailing. They are inexpensive, most ranging from the $28.00 to $45.00 range. The exceptions, (Eugen and Hipper) are no longer produced but can be found on Ebay and other auction sites. And, these kits are well-supported by the availability of after-market products. White Ensign Models even offers a Kriegsmarine-specific range of paints. Finally, this is the only range of large-scale models offering the complete range of Kriegsmarine capital ships. The only Kriegsmarine ships found in 1/350 scale are the ubiquitous Bismarck and Tirpitz.
On the down side, this range has been justly criticised for being under detailed for the scale. The molds are out-of-date, being manufactured in the 1970's. However, given the range of after-market products, reasonable models can be made.
Simply stated, if you are interested in having Scharnhorst, Gneisenau, Graf Spee, Admiral Scheer, Lutzow, Prinz Eugen, and Admiral Hipper with your Bismarck and Tirpitz, and you do not want 1/700 scale, this is currently the only way to go.
One additional comment; Airfix offers an interesting variant of Scharnorst in 1/600 scale. It features the ship as built with the straight stem. Again, I do not know if it is currently being manufactured, but it is readily available on Ebay.
I hope you enjoy ship modeling!
Bill Morrison