The K60s are stonking!!
I did a 300 mile ride in the first 3 days of having them - when I say wet, I mean wet and windy enough that my other half is reluctant to get back on the bike!! They were perfect! don't worry about the wet on the K60s.
I took a few days to get used to the non road-biased tread pattern, but I am at one with them now and am happy to push the bike a little more everytime I get on!
I tried them on loose gravel last weekend and they were great fun!
Budget wise, if you go to Oponeo, they are about the cheapes tyres on there for the Strom!