Soulcity, resize your sig before one of the moderator's sees it. The features of the MI, DMS 4, and CC are all comparable. They autoboot everything, support DVD-9 or Dual Layer games, have a built in Y-fix (so you can play PAL games on an NTSC PS2 flawlessly or vice versa), support multi disk games, PGen and SNES station, ARMAX and Gameshark, boot elfs off the Memory Card (or off the chip in the case of the DMS 4 Pro SE), support HD Loader and HD Advance, and , makes your PS2 a region free DVD player. Matrix Chips are well known for their durability, DMS chips are probably more feature packed than any other modchip out there, and the Crystal Chip is the only chip that auto patches DNA ID's for online play. When playing a backup online, you have to patch the game's DNA ID, so that the online game server doesn't detect it's a copy. The Crystal Chip does this automatically. They're all quality chips. If playing backups online is important to you, probably go with the CC.