I've never known the limited slip in my Jeep to make a difference, except once it kept making the rear go sideways like a locker would. I wouldn't want that in the front.
Plus the added cost of maintenance (gear oil additive) and the fact they wear out (especially without the additive)... I would go selectable locker in the rear only before doing front and rear limited slip.
Not to mention that using a limited slip can require driver skill (probably why I think mine is crap) where as a locker is push a button and go.
And since when are you compromising?