That will mill out just fine for 99% of us. A Blanchard Grinder will work too. One of us on GJ used a Blanchard on his...in AZ I think...
I got a 250# Trenton. Good anvil. Does what it is supposed to.
And like someone else said, a belt sander will work. Won't be perfect, but I doubt you're building space shuttles. And besides, you could always mill later.
And if you do smack cold, do in the center over the mass...not the edge.
AND...you can always get a new hard plate put on if you ever ran into a person/company that hooks you up.
Lots of guys will weld up the face/edges with 1018. Not the hardest, but still lasts a long time and you can always touch up again.