An Cafe
I've heard about An Cafe (Antic Cafe) for a long time, but I didn't really understand the whole Visual Kei thing...still don't. When I first saw a picture of them, I thought the members were girls. hehe However, I love their Magnya Carta album. A lot of the songs have a bouncy ska vibe without really being ska style (although at least one song does have brass). Here's videos for Maple Gunman and Kakusei Heroism ~The Hero Without a Name~.
Another one I've started to like is Kimeru, especially his Koishite Kimeru! (Kimeru Is in Love!) single with the main song and Rabu Tucchi (Love Touch). It reminds me of something else, probably some other music I've heard before, but it's very catchy & upbeat. Unfortunately there doesn't seem to be a music video for either of those songs, but Starry Heavens is a good song too, although the style isn't quite the same.
The third artist I'm liking now is Zwei, being introduced to them via DJ Maaya's remix of Movie Star over at AYUNITE!. This is a duo of two women (correct me if I'm wrong LOL), kind of like Savage Garden with one playing the guitar and the other singing. Here's the music video of Movie Star.