No need to apologise - once you find a saddle that fits, you tend to stick with it, and I quite like the look anyway....
The CX70 brakes with Dura Ace 9000 levers are very powerful and smooth with a great action - they look good too. How would your TRP CX9s improve on them? Do they work well with with road STI levers?
I mentioned the initial severe judder of the front CX70 cantilever brake, which was cured by increasing the toe-in of the brake pads - it occurs to me that as the brake pads wear, the effective toe-in will decrease, presumably resulting in a gradual return to judder and necessitating further toe-in adjustments (which will no doubt be limited by the extent of the dome shape on the brake shoe washers). One other contributory factor in cantilever brake judder can be a large distance from the straddle wire to the outer cable stop, as seen with headset-spacer-located cable stops (cf. fork-crown-located). It seems quite possible that those linear-pull TRP brakes would do away with that whole aspect of judder cause - have you found them judder-free?
Yes they are 100% shudder free as mini-V's usually are.
They are very powerful brakes and modulate well.
Set up is very fast - pads do need to be run close to the rims which is only a disadvantage on very muddy terrain.
My only gripe is that they come with road cartridges as stock and despite several different pads inc' Swisstop/Koolstop etc they howled like crazy.
The solution was to fit longer V-brake pads - I used Ashima 4 Fuction and they are totally silent now - the nice thing is that they need no toe-in whatsoever hence a really speedy set-up process.
The CX9's are designed to be used with Shimano road levers - I am using 5700's. The CX9's and 5700's are stock on my TCX1.
CX8.4's are for SRAM.
They look funky too; I get a few comments (positive) on them from other cyclists. I wish I had the red ones as they look very cool!
For around £80 they are terrific brakes.