your best source for minutia like this is usually
www.milehighcomics.com
in fact, they have an entire section, dedicated to the varient covers of #1 (I'm, fairly certain it's #1 of the first ongoing series and not the original miniseries)
btw, don't trust MHC prices for comics they don't have instock, there're almost always inflated, which is why they're always on "sale" when they are instock (the "sale" price is usually close to what you would expect to pay at a comic store or on ebay). But still, Mile High is probably your best place to find these specific issues
they also have seperate listings for "signed" versions of comics. Ignore these, you can just as easily meet the creators at conventions and have them sign it as payhowever many extra dollars for their signed versions (plus, it's much cooler to actually meet the people)
ok, so, according to
http://milehighcomics.com/cgi-bin/backissue.cgi?action=list&title=34686623206&snumber=1 we have...
there is a 3D cover they don't have a pic of, but they say they have in-stock
there's cover 1A, called "Charge" which they have in stock. I think this is thje most common one
this is cover 1B, which they call "Thumb Up". They have a normal and a signed instock
there is a cover C which they do not have a picture of but say they have in stock. IT's called "Lil Gen" so I assume it's probably kid versions of the group
this is the chrome cover.
the chrome cover was avilable as signed by one of 4 artists: Jim Lee, J. Scott Campbell, Brandon Choi, or Alex Garner. These covers were not available unsigned. MHC has none os these instock, but list a NM value of $120 for all but the Jim Lee signed on. The Jim Lee signed one they have valued at $146