Intake: you'd benefit from one.
BOV: your choice. The Cobb unit can be full recirc, VTA, or 50/50
EWG: better boost control and more power. If you can live with the noise, go for it. Grimmspeed offers a kit for ~$500 with everything you need.
Suspension: tires are what connect your car to the road, so they're most important. Don't bother with the strut brace unless you have a wagon, and then just look at the rear one.
The I/C you have isn't great. Consider replacing it, then worry about a scoop/splitter.
Clutch/flywheel: if the clutch is slipping, replace it with the weakest one that meets your torque output. Flywheel is up to you, but don't go too light.
EM: OpenECU is probably fine. Cobb will yield a similar tune. UTEC is nice for speed density. Go with what your tuner is most comfortable using.
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