Good to hear your going sabre for the tuning I've used Leighton a few times for mapping and he's been spot on every time .

As for pros and cons with the intercooler vs charge cooler it's always a thing where people will either love or hate one or the other.
I for one say it's depends what the car is used for, I found that everyday driving ie sitting in traffic in town etc then a intercooler works best because with a charge cooler the water which is used for heat transfer will heat soak in the engine bay quickly and then you have to watch your inlet temps when giving it some beans when your out of traffic until the water cools again.

intercoolers have the same problem but cool down a lot faster I've found after sitting in traffic especially coupled with a water spray system onto the intercooler core, but the normal draw back with intercoolers are that the pipe work can be very restrictive due to the amount of bends and also the length of the pipe work, which the charge coolers doesn't suffer from and can be mounted very close to the inlet making it more free flowing and will obviously Improve on spool up.

For a car that is more track focused then I prefer a good charge cooler (PWR) set due to the improved spool up and response of the freed up airflow also I found inlet temps to be lower due to the constant high speeds and air being forces through the charge cooler rad fitted into the front bumper.

So down to you all depends what your using the car for mostly and then what sort of money you want to spend