Some advice please....

buy the bike you want for after the event. any bike you mentioned will be fine for the event, but i would buy it  and train on it in readiness, to check bars saddle tyres etc are right, and iron out any faulty/unreliable parts

are you sure its 100mile a day? big difference between 100mile and 100km over 6 days, and training for that imho

gl

I have a Cannondale Synapse carbon 105 with rim brakes and it stops on a six pence. And I'm not in the "I hat discs" camp as my GT Grade wet bike has hydro discs and Specialized commuter has cable discs.

I do enjoy the modulation in the discs, the more expensive ones being even better. On the other hand, if I want to stop on the Cannondale I can stop. Brakes set up well can usually send you over the bars so all work

There's a few things that should govern your choice with budget being one, do you have all the kit you need (computer etc.). Any chance of upgrades to wheels etc. After that, ride them, the feel is a big thing. Also, at some point your heart will kick in over the head!

I've got an older Synapse (aluminium) and they are very good bikes. They're considered to be a more relaxed geometry for doing long distances comfortably, but they're at the more racy end of that market if that makes sense. Basically they're quick and comfortable.

My one is a caliper version and that's probably the biggest drawback with it as I have no confidence in riding it in the wet. I think the newest models have disc brakes which I now consider essential for wet riding.

I've a 2016 Defy Advanced 2E (euro routed brakes). Takes 28s and still fits fenders/mudguards. It's mech disk brakes. 50/34 and 11-32 105 5800. 8.5kg and comfortable on crappy Irish country roads. Can't say anything about the Scott as I've no experience.
If it had hydraulic brakes it'd be near enough perfect.

I’ve been happy with my Defy Advanced, I’ve done London Paris and a couple of the Yorkshire TdF stages on it.  Not sure how wide the tyres go on the new ones though.

Having just moved on to a carbon frame I would say yes. This may annoy others but also tubeless wheels. They are a total must. I hardly feel anything through the cockpit now and I am only running 25mm (wide section) tyres.

My in law has just bought a Specialized Roubaiux with specced gears of 50/34 11-34 cass using long cage Shimano 8000 series rear derailleur.  Very nice bike with suspension in the headstock.  

My comments would be, frame that can take 35mm tyres, hydraulic brakes 11-32 cass and high stack number to make it a comfortable ride.  

Worth keeping an eye on Evans’ ex-demo bikes. Often has a proper bargain or two.

Look up Paris Roubaix on YouTube. Road bikes can take a lot of abuse.

Your budget will be absolutely fine - go for decent wheels that will take wider tyres - more air in the tyre makes for a comfier ride.

I'd say any bike over about 500 would be able to cope though.

Assuming it isn't a typo, have you considered a Pinarello Dogma F10 with Dura ace Di2 and Meilenstein wheels ?

Hi Tony.

I assume you have £1400-1600 and not 14000 etc.

Your Scott looks a great bike as a (slightly) bigger guy. Fatter tyres (G-ones are top tyres) and discs are an excellent combo for an all-rounder. Personally, I'd want hydraulic brakes but that will cost extra as you will want the Speedster Gravel 10. Both have 50/34 up front and 32 sprocket at the back...double thumbs up as you will want those ratios IMO.

You could get a slightly lighter weight bike such as a Giat Defy or Cannondale synapse etc. They are a bit more road/speed focused but are still designed for comfort/distance as opposed to a race bike.

If you have your heart set on the Scott, go for it and have a great time!