If what you folks are trying to replicate is chest pounding bass, then neither system is geared towards that. Simply replacing the Alpine sub with another sub isn’t going to cut it. The main problem is how these speakers are being fed their frequency. It’s like asking one person to be an entire baseball team. Without really going into it, before tossing money/ equipment at it, each one needs to decide what you want from your system.
I could easily give several suggestions, but there is no way my likes will meet everyone’s needs. Right now I’m gathering all of my nuts so that when the time comes, the system that I’ll install will meet my needs. Yes it will be overkill, but that’s only because it’s nib equipment that I already own. Why toss out the bath water just because it’s lukewarm lol.