The CT-120 is the way to go.
I have them and the CT-125’s. The 125’s are sweet, but the 120’s are sweeter.
I am also using Kappa 15C’s in one pair of bass bins.
I think any “perceived” loss of bass by switching out the K-33 is a direct result of the “definite” increase in mid-bass the Kappa 15C brings to any application. It is immediately noticeable.
The only issue with the Kappa 15C’s is the gasket. It is similar to the foam a pool-noodle is made of and compresses more each time you tighten the screws. So much so that eventually the woofer will slap on the motorboard when cranked tight.
Some have suggested an aftermarket gasket. In my FH-1’s it was not required due to the design. In my LaScala bins one of them produced a buzz at spirited levels.
I whole-heartedly preferred the Kappa 15C over the (venerable) K-33 and K-43 in any application yet.
I have yet to try the Crites woofers...