Advice on groupset for a 90s audax frame

[C R]

I have heard it say that cantis are bad but even though i have never used them till recently i managed to get them working as good enough not to consider them bad , certainly on par with rim brake set up .

They're not bad, just somewhat more fiddly to set up than Vs.

 

[wafter]

I think the OP has flat bars anyway, so getting suitable V compatible brake levers should be easy. In fact, most of the integrated brake/shift levers for flat bar tend to be for V brakes.

Ahh yes; missed the flat bar bit. I suspect as you suggest most will suit Vs by default

 

[Paulus]

They're not bad, just somewhat more fiddly to set up than Vs.

Cantilever brakes can be a bit of a faff to set up until yu have done it a few times. Once you have the hand of it they are very good at stopping.