what is the weakest link in my audio chain

If yoy're happy with the sound then your Bryston amp has to be warm sounding since Paradigm Studio v2 has bright unforgiving tweeter (Vifa). One of the better bargains in speaker cables DH Labs Q10 is slightly on the bright side (silver plated in teflon) - you need to try.

Studio 40v2 is a good speaker but its amplified version is a great one. The difference is lack of speaker cable and good amplifier matching.

Yeah, try swaping out that HD power cord you're using for speaker wires with one run of adequate length 11 conductor sprinkler wire, or two lengths per side of 7 conductor, and see what you think! Then YOU'LL know. Good luck

If yoy're happy with the sound then your Bryston amp has to be warm sounding since Paradigm Studio v2 has bright unforgiving tweeter (Vifa).

This is a popular misconception, IMHO. I have the same setup as Benqsun, except I have 60's for the fronts instead of the 40's. I've owned mine for 5-6 years and brightness has never been an issue for me.

Cruz

V1 tweeters were horrible and V2 are a little better but still on the bright side - I know I have 60s v2 and recently got rid of original $25 Vifa tweeters. You might find reviews describing Paradigm v2 as neutral or crisp but you won't find single one calling them "warm sounding".

If brightness is not an issue for you - great.

This is from "Audio Ideas Guide" review of Studio 40 v2 (link in Audiogon reviews):

"The Paradigm has a slightly more forward quality, but is otherwise a very neutral reproducer. That extra on-axis energy between 5 and 7 kHz can be heard, and if it were tamed by about 2 dB, the Studio/40 would be, in my opinion, a virtually perfect dynamic loudspeaker."

I don't think I ever remember ANY Paradigm speaker I ever sold, EVER sounding bright, from my recollection. Infact, I think they're a little shy in the treble from what I remember.
And the Bryston should keep the sound mellow.
I like a little more extended amp with those speakers, really. But, experiences vary.
Personally, I think people here some setup somewhere, where they hear some tonal character, and they make assumptions! Can't tell you how many times over the years I've heard bad combo's of gear, only to have people make assumptions about one piece of equipment in the chain - as if the sound was coming from only that specific component!
Um, no, the paradigms were never bright. Infact, I dare anyone to find any reviews that describes a paradigm speaker as having a bright ANYTHING!