The Nishiki is the better of the two, But most bike shops won't stock 27" tires, They have to be ordered. (bikenashbar.com has them cheap via mail order) Unless you can do your own work you are at the mercy of your local bike shop where the bike is likely going to be older than the mechanics. $150? I have seen worse sold for more. I'm not in SF so I don't know values there, Here in NY I would pay no more than $100