K24 Turbo

The car I bought came with an extra K24 Turbo. Either one will need rebuilding if the cores are good. I haven't taken them apart for inspection yet, but I'm debating on whether I should replace them with a different unit from the get go. Low rpm boost will be very important to me, but the car will run to red line all the time also. I think this topic will take a lot of research. I'm wondering how many hp the stock turbo is good for and what its spool characteristics are. I've got a couple of places to ask, but if anyone has been down this road, drop me a line. I will post the information that I come up with.