Excellent stuff, time to prepare is always a bonus! Silverprint do a great range on both print and portfolio boxes - they look pretty pro and allow the prints to be handled and examined easily, the link's below. Hope it all goes well!
http://www.silverprint.co.uk/ProductByGroup.asp?PrGrp=713
http://www.silverprint.co.uk/ProductByGroup.asp?PrGrp=713