I've been playing(and loving) R-Type Final over the last few days, and it got me thinking about the Shmup genre. The most revered games in the genre are from the Saturn era and before; Radiant Silvergun, Thunder Force, Raiden, Batsugan, Dodonpachi, etc. etc. etc.
I have Ikaruga and enjoy it, but other than that the selection of current-gen and last-gen shmup games seems a bit thin. Other than R-Type Final, Silpheed: Lost Planet, Raiden III, Ikaruga and Gradius V, are there any shmups with North American releases worth checking out?