I'm currently working on a 1:2400th naval project and a rule set to go with it. I'm a licensed printer for War Times Journal models so I've created a rule set to work with them.
Scale wise, 1:2400-1:3000th is my choice for WW1 naval. Its a great mixture of smaller size miniatures which can be used for larger fleet actions and highly detailed models that are enjoyable to paint. Plus being able to see them and recognize the ship from more then a foot away is a bonus! GHQ do absolutely fantastic models at 1:2400th scale, a member of our group has a bunch of them and they're gorgeous. I personally prefer the 3D printed WTJ models due to cost and how sturdy they are but admittedly I'm a bit biased!
Rule wise, I personally find a ton of naval sets incredibly complex and I've designed 'Dread Not!' to be a simple/ quick play game. While there a little bit of math involved of course, its relatively light while still providing a good feel for the period. We've used this set to play everything from Coronel/Falklands up to the Battle cruiser action at Jutland and it handles it well.
I am bringing this set to Kickstarter on March 1st, if you'd be interested in following along you can do so at
https://www.kickstarter.com/projects/dobbieshobbies/dread-not