Well...you’re missing a bunch. Output, extension, linearity, damping etc. I have a 505 mixed in with 2 pc12 pluses. Compared to them it’s a fart box, but I only run it up to about 50hz so it’s only reinforcing a small range. That’s because it doesn’t sound good crossed higher, especially when pushed. It’s a decent beginner sub, or as a quasi mid bass module(in my case), but by itself just isn’t great. I would also remove the SB from your list. IMO sealed subs only belong in tiny rooms where space is a premium. As mentioned, HSU is likely the best performance value, but SVS has unmatched CS. If you can, it might be worth trying to swing the HSU dual drive right now vs waiting to budget for it later.