£2000 will see you to 300BHP according to Abbey, in my personal opinion you must have more money than sense. If you want power gains get a supercharger or NOS.
Or buy a V8.
The only reason I will get the uprev is because of the driveability benifits, making the car drive a lot smoother as I heard its a very different drive once its done!
Dont look at it as £2000. Just do what i do and say its only another £400. I never add up my mods as its very scary lol