We can do remaps on a compltly std car, the mods you mention will help if you are after more power though it all comes down to what you want.If you bring me a 100% std car, i can certainly make it totally different when you drive away, its astonishing really how different they are.

I found with the cooler, you dont really gain much power, but it stops you loosing it.
After 3 runs from 100-140+ in my 320D the power would drop massively as the charge temps were huge, and you could really feel the power vanishing after every run.
The big cooler kept things constant, 10-15 runs back to back and it was the same every time, no drop in power at all.