So I am leaning towards forward mounting the speakers behind the seats. I am looking for recommendations or opinions if a 6.5" 2-way like the Infinity Kappa would sound better and/or worse than a dedicated sub like the Kicker or JL 6.5?

https://www.crutchfield.com/p_108K63...appa-63XF.html

Also does anyone know the max size of an amp that will fit in the stock location by height x width and length?

Thanks!