I know whatchu mean Nazu, but when Japanese versions sound just as good as the Korean versions, then I'm okay with that. DBSK and SNSD's remakes have all sounded fine to my ears. I'm a fan of 2PM, but I hate to throw them under the bus when I say that Heartbeat (in Japanese) wasn't music to my ears. However, I really like Take Off.
The Japanese Replay sounds fine to me. The weird thing is; I've always imagined a Japanese version of the song, probably back when the original was first released.
Anyways, good luck to them.
Oh, I also read an article about SHINee performing at Abbey Road to celebrate their Japanese debut. Sorta random. Is there a connection?