Jarrod, just so you can drool over the best portable saw out there, here's a link to the
Sawstop Jobsite Saw.
My sawstop cabinet saw is beyond reproach. It's infinately adjustable and holds onto calibrations. The safety aspect is just a bonus.
You do have to watch after metal, though. If there's an embedded nail, it'll cost you about 60 bucks to replace the crash cartridge and it'll ruin your blade.
That said, there's a key switch on my saw so I can turn off the protection feature if I'm cutting questionable material.
I also check old lumber with a metal detector, but that's just when I'm using lumber that's hundreds of years old. Reclaimed stuff from old house or under water.