I'm planning on getting the new Metroid game but there is one problem

[Hephaestos]

so if you have a thing against playing retro games (some people do) you can always try shadow complex on the XBLA, it's a complete rippoff of the classical metroid formula (with HD graphics and voice acting... it's still inferior though but great game none the less).
And yes Super Metroid is the best one.

Another M though seems like it'll be a bit different from the standard formula but still great.