Pistons. Original Toyota or CP?

I have some Stock Toyota pistons lying around for my Celica CS. But I have some Eagle rods and CP pistons on hand for a great price.
I'm going for CT20b, and 3" all the way. Upgraded fuel pump All other are stock.
Will CP an Eagle be a good investment, or will the stock pistons and rods be more than enough? I guess my setup will give no more than 250 bhp at the flywheel.

Stock will more than handle that. If you're not looking to push 300+ at the wheels I wouldn't spend the extra money on the high end rods/pistons

I have Eagle rods and CP Pistons on my 1991 stock 3SGTE.
Ran about 3000km and they work fine.

After 4 years I would hope OP picked up some pistons already.