My first anvil was a largeish hunk of semi-rectangular mild steel set up on end, with a stage curtain weight set up on edge for a long face.
My second anvil was an import, with 2 hardy holes. It had a cast iron body and a fairly decent and thick steel faceplate.
Now I have all Brooks. 560#, 140#, and 56#
I use the 560 everyday and love it to death...
The 140 is my long term temporary setup anvil (setup for more than a weekend)
The 56 is my traveling demo anvil. It is almost embarrassing having a 56# anvil at a demo, all the other guys bring out thier 110#+ anvils and I am just ringin' away on that little hunk of english steel...
Mike Lambiase