Thanks for your input so far guys.

Would love to go an STI but i want an 05 model or newer so an STI would be too expensive.

I dont plan on modifying the car thats why i was interested to see if there was any major power advantage over a standard WRX.
Even though there seems to be not an awful lot of difference i still like the fact the WRP10 is a Ltd edition and the Rims look hot!!!

Other option is go brand new, i really like the look of the current shape and i will get to choose my favourite colour, WR Blue again.