Yes the stock rods are plenty strong. Lighter weight rods wouldn't hurt anything though so if you have the $$ and you want them...
I typically spend about $160 on a block (tanked, checked, decked and bored), about $200 on a head (valves, repair or replace seats, springs, repair or replace guides, milled flat), A crank (turned down and balanced) is usually around $120.
So I'm thinking about $500 for your machine work should be plenty.