EBC's control boost & make the boost come on alot more harder then a T Peice will and defeinatly control boost spike especially if your looking at holding decent power where 1 - 2 psi extra will cause your car to detonate and end up smashing pistons.
If you can afford it and are looking at running more then 10 - 12psi a EBC is definatly the thing to buy.
Buy a apexi powerFC boost controller that works in conjunction with a powerFC if thats the ECU your going to be running, stealth as, its easy to hide the boost solenoid in the engine bay and can all be controlled using the hand controller or laptop via the tuner I think,
Thats what I am going for anyways. I will have a bleed valve forsale soon if your keen Cara - Its a turbosmart one lol