I agree with you on lots of points mate, its just in my case peak power and peak flow rates aren't nearly as important to me as low to mid range torque with acceptable but compromised top end. There are lots of cases of heads that flow more but actually make less power/torque in the real world in the right places compared to a head with a lower flow rate etc.

Any ho, cheers for the input every one. look like i have 4 turbo's to think about lol
One from the IHI range, stage 3 t3 (.48), GT2560 and GT28 that gary suggested.

Nice dyno Gary, and DazC when you get yours on the rollers i would love a look