You want 24 gauge standing seam, either double/mechanical lock, or snap lock, not single lock. You want one that has a kynar finish, which has a very long warranty. Stay away from ribs and striations. If you are right on the ocean I believe there are certain types that can withstand the salty sea air, just not sure which ones are best for that. I would also recommend having the entire roof done with a high temperature ice and water shield. And most important, make sure the installer balances and lines up the seams and doesn't just start with a whole piece on one end. The seams on the end should be the same distance from the edges. Also, the seams should meet at the ridges. Find a good metal artist. They are out there. Make sure you tour their work. Metal roofs are gaining in popularity and there are a bunch a rookies roaming about.
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Ballet White and the door and trim is Stonington Gray both from Benjamin Moore
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