Braid is hardly a Mario "rip off". It simply tributes a few things to our favourite plumber. If you'd played right through Braid, you'd know how much it is NOT like Mario.
![Stick out tongue [:P]](/emoticons/emotion-4.gif)
On topic though, I would certainly buy Sonic CD for basically any price (within reason), sadly, it's highly unlikely that it'll ever come to XBLA.
Im a solo musician trying to be heard, please add/listen to my Rock/PostGrunge style songs: myspace.com/jeromebartlesmusic