I strongly recommend a NEW 27 x 1-1/4" Panaracer Pasela. Not the older ones that were ISO size 630-30, but the new ones, which have just begun shipping, that are ISO 630-32. The old ones were undersized, measuring about 28mm. But the new ones are quite plump, measuring almost a full 32. With a very supple, high quality carcass, they roll easily at low pressures.
My wife, who weighs as much as most guys, likes hers at 65-70 psi. They coast quite well and give a much better ride than at 80psi. I like the security of knowing the tire is rated for a much higher, 95psi, pressure than she's using.