In reply to Andrew W:
I'd be inclined to avoid buying a "cheap" pair of factory wheels and blowing the budget on a good hand built rear if that's all you need.
A Mavic Open Pro rim built up with 32 spokes (or 28 if your lightweight) on the best hub you can afford would be a good option. Easier to true and maintain which would be high on my list of priorities if the bike is mainly a commuter.
CRC do an Open Pro built on to a Hope Pro 3 hub for £180, for example.
Rob