Traditional hinges may allow for easier door removal. Likely not an issue, but if moving it shorthanded, a couple hundred pounds lighter can make a big difference.
I definitely recommend the pre-drilled holes. If you don't bolt it down, it's just a convenient but heavy box for thieves to roll to their car and take away. You can always seal the holes/bolt downs with caulk when you anchor it.
Back to the mfg question.... can't go wrong with Sturdy.
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