You make some good, If uninformed points.
I was joking when i said get a Commo...
If you spend some coin on the motor, i,e:
Higher compression
Ported heads
Custom grind cams
valves/valve springs
good exhaust/intake (Looking into ITB's if you're really wanting to go balls out. Expensive but will really help with an NA)
I don't see why the EZ30 can't do 250kw@w in NA form. It'll have to rev pretty hard, but meh.
Cars are never cheap as you say, thus all the more reason to research and spend money wisely.
i won't be doing any 'hardcore' NA mods to it... as i may be putting boost into it at some point in the future...
intake, exhaust and tune... should be right for now... hoping for 210kw at the fly