Randonneur bikes - inspirational?

I really like some of the 650B conversions that are knocking about.

I've been toying with the idea of converting my old track frame to a 650B with mudgaurds and a new set of forks.

650A might be a cheaper way to go; good tires that cost less are more widely available, and the rims are bigger than 650B and look possibly more natural in a frame meant for 27s or 700 wheels.
They don't have that "air" about them of course, nor the wild colours.