Have you picked out a Tuner ?
That should be on your list and follow his advice.
I'm questioning if you really need the valves and such, coated exhaust manifolds,
Your not looking for a 10 second car just a good DD.
You may want to find a used block in good shape and rebuild that instead of buying a new OEM and taking it apart and throwing away the insides.
I may have missed it, what tranny do you have ?
203,000miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
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