Some of those achievements look deceptively difficult to do without specific DLC (even the ones that don't flat out require a raw quantities of DLC).
20 notes with a Bottle Rocket powerup, for instance, would require a song with a ton of high-density notes. Might be easy, might be hard, might be impossible with the basic 25 songs.
10,000 points on a Shockwave could also be problematic. We know the base value of a note starts at 10 points, so that's a lot of multipliers and bonues you'd need to get to 10K. Is there a song in the 25 that come with the game that has that sort of note density? Maybe, maybe not.
At the very least, I'm certain that there will be DLC charts that make some of these much easier than if you were limited to the basic 25 songs (The Who - Super Bowl Smash-Up and Rush - 2112 come to mind).