Tarox brakes?
Uk spec brakes are VERY good, there are several high powered vehicles on here which have kept Uk brakes at 600hp. (Cant think of names at the mo)
The Uk Supra actually held a braking record for several years for production vehicles until the GT2(3?) came out.
For your intended power levels your brakes are perfect.
Best stick to OEM discs is the advice most often given on here.
You can still better your brakes performance however for a lot less than £1700.
Change your flexi pipes to braided (£60), Chris Wilson fast road pads (£150ish) and then change your fluid to Motul RBF600 (
The above, maybe with tha addittion of a master cylinder stopper to remove flex, will make your current set up feel more precise and "bitey"
Use Google to search for instructions on how to set up your particular AVCR.
The stock Uk fuel pump is up to the job of BPU, but I would change due to age.
There has been much debate with regards to hybridised turbos, basically concluding its not worth the money or hassle for the small gain over stock. Your turbos are capable of 1.4 bar boost.
Hope that helps.