SeamasterLux -- you beat me to it! I too am on a train typing this on an iPhone...
I am positively thrilled to see SF finally talking about French tailors, the unsung heroes of the global sartorial arms race IMHO (e.g. a selfie of my Camps de Luca suit, the only CdL pic EVER posted on SF, went virtually unnoticed on the WAYWRN thread; as a result, I've snobbed SF since, but RJMan coaxed me back by flagging this long-awaited thread.)
Don't hesitate to ask me or SeamasterLux any questions about the French tailors, between us we have experience with almost all of them. For pics, see my WIWT Tumblr dirnelli.tumblr.com and use the search box to call up pics of items from just about any tailor, including hard-to-find vintage ones such as Claude Rousseau, or even some vintage Cristiani and Lanvin coming up, as soon as I get them back from alterations.
The young guns on the French scene Suzuki Kent and Brano also seem very promising.
Another house worth knowing about, one that you won't read much about online, is Marc Di Fiore -- which is at the top of my list to try next, given the 2500 euros starting price and the quality of the work I've seen.
BTW -- Camps de Luca starts at 5900 euros and Cifonelli at around 5300, if memory serves.
I read a comparaison with Huntsman above. I would hesitate to draw such comparaisons between SR and the Parisians. If I were to sum up, the French tailors fall somewhere between SR and Italy, as their geographic location would suggest, striking a perfect balance as they do between the somewhat 'armoured' design of the Brits and the fluid construction of the Italians. On top of that, the French tailors have a quality of needlework that you simply won't find anywhere else -- the most consistently perfect stitching, embroidering and buttonhole work worldwide, bar none.
The main issue is getting ahold of this stuff while you still can. It's my understanding that no one knows how to work like that anymore, and the ones who do are all retired or close to retiring, so there's a real question mark about whether the younger generation will be able to keep the tradition alive. In Paris, contrary to what I've heard re SR, none of the tailors share workers with eachother, so there can potentially be marked differences in quality from one house to the next.