Asphalt or metal roof

[Jonathan Roberts]

Potential deal: 

Looking at a triplex later today which from the pictures needs its shake roof replaced. This property will be a buy-and-hold which begs the question of whether I go with a bit more expensive metal roof or asphalt shingles. I've read that metal will last possibly twice as long as asphalt though a tad more expensive to install. Most roofs in my area, Cheyenne, Wy, never make it to 30 years and are lucky to make it past 5 years... Any opinions? 

Thanks!

-Jon