Hi guys,
Keen to share my results, hopefully they might help others in choosing their setup.
S1 RB25det, 2013 ATR43SS1PU turbo, stock manifolds, 3" exhaust 100cell cat, megasquirt ECU, splitfires, sard 850cc injectors, DW300 pump, undersized intercooler (high intake temps and around 4psi drop).
Graph shows 98 on gate pressure vs ethanol with a little more boost.