5sfe radiator upgrade? Options

[Vissi]

yesterday I was driving around and I realised that my tempature guage was a bit above normal, and rising, so naturally I pulled over to find a 2 inch crack in the top of my radiator. I filled it back up with water and it seems to hold prety well, but the water is slowly leaking out onto the radiator.

I was just wondering what radiator to get, a new toyota radiator is like 470$. Iv seen koyo radiators on the forums alot, but are they worth it? Id like to keep it under 200$ if possible. Autozone had one for 140$, but something tells me its crap. How hard are they to install, Iv never had to deal with my cooling system before.
Thanks in advance, David

Also if anyone has a carfax account I would realy apreshate it if they looked up my car and sent it to my emai, levathan1@yahoo.com. The vin is JT2ST07N3R0007256