Its the same old argument for and against cone filters, when your car is moving along all the air surrounding the front of the car does not get into the engine bay as the air knows theres a cone filter under the bonnet, leaving all the hot air to find its way into the engine.
If you want a cone have a cone, if you want an airbox have an airbox, the next thread will be chargecoolers and intercoolers im sure.

PaulT