Re: tyres:
i had continental gatorskins as OE on my road bike (fixie), but was plagued with punctures - at the back only, which ai replaced with a Schwalbe durano - which is a grade or two less robust than the marathon. i've had no punctures for last couple of thousand miles - bearing in mind the front conti gatorskin's probably done 10,000 It appears that the back tyre had been damaged internally which had been rubbing on the inner tube, and in truth nowt wrong with gatorskins - just bad luck. So gatorskins are actually fine to be fair.
So, i would happily recommend schwalbe duranos or conti gatorskins as all round commuting road tyres, at least from robustness point of view. Grips seems ok, though i did once have an unplanned dismount in the wet, aftwr locking up front wheel (conti). as well as user error, there was an adverse camber & greasy road in play.
i have schwalbe marathons on my thorn nomad, which is a heavy duty off road tourer / semi-mountain bike - these are even more heavy duty, but i'd not think them necessary for the road.
i have no first hand knowledge of other tyres