I recommend you keep it as simple as possible. If you run lean, get the SL55 pump. If that alone doesn't cure it, you need to decide which of the two proven paths to take (or go your own route) TTM or NW.

I like Rob and have a car full of his stuff. However, in this one instance I not a fan. I don't like the complexity of the system. To me, running a solenoid, AF trigger, adjustable fuel pressure regulator, etc is way too invasive and complex of a fix. IMHO there are too many things that can go wrong.

With the TTM setup, I installed the injectors, modified fuel rail (with front crossover), and got a retune. That's all it took and I'm seeing a pretty flat fuel curve across the board even when I hit 22.7 PSI.

I really don't know what the TTM setup costs (as I got it at a discount for being a guinea pig) but I suspect the price is comparable between the two.