Heuhen, you kill me! I thought I had the awesomest double-ender! Now you force me to outdo you! Oy weyh, were is this all going to end?!?
He he he he!
On two reactors you are going to be at about 31 knots. With a set up like this (with one reactor that can be directed either toward electrical load or propulsion) I would strongly suggest that you make her Nuclear-Electric, as it could improve the propulsive efficiency by not inducing a further steam capacity difference between cruise and maximum loads on propulsive turbines (by removing propulsive turbines from the equation). That is, if you have a 50% over capacity in the propulsive turbines, that's going to decrease the efficiency of said turbines when running at cruising speed more than the losses of moving to a Turbo-Electric drive.
This also allows you to do such things as power a city in the event of a disaster, and split the output of one reactor to both screws more efficiently. It also means that you can, if needed, replace the engine system without gutting quite so much of the ship, and also means that you stand a good chance of being able to go full speed in reverse.
Edit: As a minor note, the third reactor, when mostly dedicated to propulsion, only buys you ~ 3 knots of extra speed. I'm not sure the added mass and volume is worth it.
You Gave me a good idea and convinced me!