Having both, I'd say, you can't go wrong with either. Preference depends on what you wanna go for. Both pickups are vintage voiced, but the 408s do take gain very well. The 58/15LTs are probably lower output, but the scale length makes a lot of difference. As it's shorter, you get a deeper low end. The 25" scale is tighter on the lows.
I mostly play rock too, but the 594 is everything the famous 4-knob contender should have become.