Mirrored, colored or see through cedar framed shapes.  For the man cave get any of the shapes with a mirrored back round for a definate conversation piece or have them empty for the negaitive space effect.  For the ultimate USA sports nut get baseball, hockey and football in red, white and blue colors.  Prices will vary on design complexity, material preference, led lights and choice of backrounds if any.  Typically $35-$75.