The only things that I would change with that setup is I might swap out the the Alfine with a Sturmey Archer 8 speed. Its 1:1 is in first gear, so is better suited to small wheels.

I'd also go with Kojaks over Marathon Racers, but that is such a personal choice, it's hardly worth mentioning.

IMHO, the Swift just works better with internal gear hubs. The combination of derailleur hanger placement, and seat-stay angles can make certain derailleur setups a bit of kludge.