I am trying to change what I got from what I have in my sig. I am not necessarily wanting more output, but essentially a bigger bandwidth of frequencies, such as a 4th order, tline, maybe even a sealed enclosure with 2 18s only for sealed, or a 6th order with a few woofers. What would you do? Trying to keep my amp the same and going to upgrade my mids and highs later on. Opinions and thoughts? Woofer brands, sizes, enclosure style? Trying to get mid 20s to probably 40ish or a little bit above.