I've run both BB5s and 7s, set both up for cross/road bikes, and have worked on the whole range of CrossRips.

IMO, the step up from BB5 to BB7 is not worth it. And I don't like the final setup for either -- using the road specific calipers with STI shifting units, there seems to be overly much throw at the lever for movement at the caliper, and getting them set up with no brake rub is more difficult than it should be.

If you are considering an upgrade, go with the TRP HyRd, as found on the CrossRip Ltd, or just ride the BB5s for a year or two while road bike disk brake tech catches up to demand.