London to Paris Tyre Choice

Hi there,
I was dead set on getting some Ultremo R's for my London to Paris ride in about 5 weeks or so, but some reading has me worried these might not be OK?
Guess most of the route is going to be country roads, but obviously not all..
Are the usual candidates OK with some luck for such a ride? (Don't want something too heavy)
Conti GP4000s
Vittoria Corsa Evo CX
Ultremo R (I like the big logo on these for tart reasons!)
Pro Race 3
Or do I need something a little more robust?
I was dead set on getting some Ultremo R's for my London to Paris ride in about 5 weeks or so, but some reading has me worried these might not be OK?
Guess most of the route is going to be country roads, but obviously not all..
Are the usual candidates OK with some luck for such a ride? (Don't want something too heavy)
Conti GP4000s
Vittoria Corsa Evo CX
Ultremo R (I like the big logo on these for tart reasons!)
Pro Race 3
Or do I need something a little more robust?
Planet X Pro Carbon SL
Specialized Allez Sport
Specialized Allez Sport
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