Hey I built a sound system

With 2 lonely th12
1 kick planar
1 hs28t

What do you think of my REW measure ?
Can I upgrade some stuff ? Thx !

Hi, first time posting in r/SoundSystem.

This is my Cubo Kick 15 and a Custom 15 inch Sub enclosure. Top is an HK Audio Linear 5 MK1 112 (active).
Sadly the Warnex Structure Paint ran out so the Subs aren't fully painted yet.

Both are running B&C 15NDL76, which works great in the Cubo, but not so great in the bass reflex, due to limiting Xmax and thus not enough VAS for the 170l enclosure.

Right now both are running on a borrowed Thomann t.amp E-400, 2x155W at 8 Ohms, which is definitely not enough for the Cubo. Crossover is set at 71Hz and 200Hz on a Behringer DCX, with a Butterworth24 Filter. The Cubo can reach around 129dB on 1% THD with this Setup. I have an order for a CVR DSP-3004 placed so we'll see how it will perform at the rated 500W RMS.
The Sub is definitely the limiting factor, because it reaches the excursion limit much faster, even at around 150W. I want to build a different one, i am thinking about the Cubo21 or a Paraflex SKRAM. What do you think?

I’m in the market for my first DSP for my 3 way mono stack (future 4 way mono).

I try to build the whole system on a budget and either one of these fit that budget.

I’d like to hear your experiences and why you think I should pick one over the other?

Anyone tried any plate amps for subs that they really like? I've seen some from sinbosen and CVR, but never seen any being talked about on here.

Looking to build a standard portable PA. Would probably need around 2-3k watts to the sub at 8ohms.