Thanks guys, I was leaning towards discs already, so good to know. And I appreciate the tire suggestions too. At the moment the build has the Schwalbe CX Comp 30s.
The alternative to to that Swiss Cross is the Outback.
A couple of advantages:
1) From what it sounds like its a bit of a middle ground between the road and cross. It has a lower bottom bracket, so it's probably a bit more road use friendly. Also has through axles...although I'm not really sure what the benefit of that is, ha.
2) I love the teal paintjob. I know, purely aesthetic. Although I don't mind the black of the Swiss Cross either.
The only problem...it's only coming out in September at the earliest.