Koyo Radiators Options

[elvasoshexai]

so my radiator cracked and i'm looking for a new one. but had a couple questions

For those using the all aluminum racing radiator (R1958), how many of you actually changed the thermostat/water pump (whatever else is needed) to achieve lower temps?

Koyo also makes an OE replacement (A1575) that has a copper core and plastic tank. does anyone have this? is this as thick as the all aluminum one?

and i'm just deciding on which to get. i read a few old posts and it seems like most people with the R1958 all alum radiator don't change anything else, so it seems like they aren't taking advantage of the better cooling anyway.

so i'm wondering if i should just get the OE replacement one for about 1/2 price. (i will be going 5sfte soon)