Best Impreza for £8-£11k

[AngryBaldMan]

Looking to get back into Scoob ownership. What would people say was the "best" out there for my budget. Ideally I'd like a bit more power than standard 350-400 bhp. I'm not interested in much more than that.

So far from reading on various forums the key ingredients seem to be:
JDM
2.0 block
Twin Scroll Turbo
DCCD

Anyone have any other pointers to help me on my quest..