Some friends were discussing making the perfect Boiler Maker, i. e. a shot of whiskey with a beer chaser.

One says the perfect combination would be the origional Four Roses whiskey chased with Budwieser.

A friend from Pennsylvania states the classic where he came from was Imperial Whiskey and Iron City beer. The "Iron and an Imp" as they called it.
Any one have any thoughts or what is poplular in their area.