you can't just "pop" a vision board into a shocker like an imp. They are the same board, but different connections...
and you should be fine w/ a halo and no vision. And may i sugest a Reloader B instead of a halo for the added wow factor
Laser engraving can be colored... but not individualy colored, it's really hard. but you can have the gun lazer engraved, then have someone anno it.