I have a tyre tread FETISH, Mayo, so I totally know how you feel about the Rossos not looking as good as the Contis. Actually let's face it, that tread is butt ugly
Can't say I'm too fond (always aesthetically speaking) of my Corsa III's either, but in all honesty there are very little good-looking treads out there in the supersport tyre range - the only ones that look pretty decent are the Dunlop Qualifiers, though I'm not hearing very good things about them in general! I must admit that the Contis definitely look mean - probably the nicest-looking tread out there for the last few seasons
Having said that, I'm happy you are liking the tyres. Can't go wrong with Pirelli. Made in Italy baby
From the looks of that tread, I would say you can COMFORTABLY make your trip without switching tyres. Will give you a good idea as to how many miles you can get out of them as well!
From the type of riding you say you do, though, I would definitely recommend to you to try out a set of supersport tyres as well. Chances are once you get used to the increased grip levels, you won't want to go back!