You have various mate. For as long as I can remember the Forge ones are the best, but I recently forgot just how pricy they are. Thing is they are pricy for a good reason ie quality and figment. They are designed for the car. You have the normal uprated one or the 'big race' one if your chasing big power.
Then TX Autosport do reasonably good ones and they are around £349. Not as big as the forge, half the price and some fellow forum members with this cooler achieve good torque and bhp figures.
Or the latest AmD Airtec FMIC. Which is £475 or £600 fitted, seems a good one. Rated to 400-450 bhp I think, but I will never be chasing those figures. A nice 300 with 300 torque is fine for me, hense my recent purchase of the TX.