As has so frequently been written here, "It all depends".

You have a large, exciting, ambitious project, and enough water to have a real chance at a trophy fishery. It would probably be best to invest in a little shocking action as the lake matures to really nail down the number and size of fish that need to be removed.

In the meantime, do everything you can to encourage your forage base-fertilize, consider feeding, etc.

If you've already posted this, please forgive me, but what fish do you have in the lake so far?