If you haven't played any of the Bit.Trip games, a solution is en route. Gaijin Games and Aksys Games are bundling all the games in the series--Beat, Core, Void, Runner, Fate, Flux--for both 3DS and Wii. The former's coming under the name Bit.Trip Saga, the latter as Bit.Trip Complete.
Each version's getting bonuses, too. On 3DS, it's...3D. And if there ever was a series whose visuals were perfectly matched for the benefits of 3D, Bit.Trip is it. On Wii, it's a soundtrack sampler, 120 challenges, audio and video galleries with remixes and production art, additional difficulty modes (as if these games weren't hard enough to begin with), online leaderboards and letters from the developers.
Both are dropping on September 13. Bit.Trip Runner in 3D? I'm in a puddle of drool.