For that wattage and that tuning, i'd go with sundown sa's. If they are getting 750~1000 watts each, they should beat his. But just depends on box, car, ect.
Level 3, it might be fine on that wattage but just in case, i'd get it with lvl 4 coils but that would push the budget up as well.
Hdc3, does not like that tuning in my opinion. And they are power hungry. Like I mentioned, my one takes the 2200d all day.
And a w6 is more for sound quality. It still has output but you're not going to beat a couple LI's.