Just curious - why exactly do you want to swap out the wheels? The ones that are on the bike are decent quality wheels, and you say the bike is in like-new condition. I agree with Chris_in_Miami; just put a pair of 1.5" Pasela tires on, overhaul the hubs and call it good. There are plenty of us over at the C&V forum who ride 27" wheels. The money you save will buy you a Brooks.

Here's an old Bridgestone that I had for a while. The color grew on me.