Checkman-

Go for the 20/20
You won't be disappointed!
Mine is a ripper and tons of fun to shoot.
I have pounds and pounds of roundball that I got ultra cheap from a shop that couldn't move it (new old commercial stock) so they sold it to me for about 1/4 the spot price of pure lead.

If you get one, get a roundball mould to go with it.

Cheers
Tinker