There are loads of excellent power MOSFET's available these days... some mentioned above. I quite like the IRL1104.
I reckon they beat the pants out of bipolars for switching. But concur with the above comments - how can such a tiny bit of lead cope with such huge currents? Look at the starter leads on a car rated at 200 amps or so.
Answer - not for long!
But for high voltage I'd look at IGBT's
Allan.