Schwalbe delta cruisers always look good in my opinion, and are available in 700c and English 28" sizes. If you can find the version without the reflective stripes and remove the printed logos so much the better!
I've also used some 'Innova' branded cream tyres recently and they ride well too.
any tyres are going to look good on those 'ghisallos'; I'm considering purchasing some of their rims myself and would love to see the finished articles if you get some.