Great choice of gear and the DALIs would be a perfect match IMO. I spent a lot of time listening to some Euphonia MS4 the other day and they were outstanding with all amps we tried. Not to mention they look beautiful.
Anyway, with this gear, I would go for MIT cables. They have an open and clear top end that will compliment the smooth Classe gear very well. But there are zillions of cable options. All you will get here are more options to confuse you.
The best thing for you to do is to buy a set of cheap cables for now, until your system is fully burned in. Then you can buy several more different ones to try out. If you get them used, you can resell the ones you don't like at basically no cost to you. The right choice will boil down to your personal taste in any case.
Arthur