"Kamen Rider Den-O" was fantastic, trains and all. =)))
"Kamen Rider Kabuto" features the most stupid (sidekick) Rider so far, Kabuto's 'rival' Sasword. Otherwise, it seems to be just another Rider TV-show, good but nothing special.
P.S.: The main "Kamen Rider Kabuto" protagonist's name is Souji (総司). Same kanji as in "Okita Souji". ;) By the way, in one of the "Kamen Rider Fourze" episodes, during a visit to a 'Kyoto movie village' Gentarou chooses to cosplay Miyamoto Musashi, while Meteor cosplays Okita Souji.