I own a metal pipe, so there's two points I'll make for you...like they haven't been made already....I can pack about 3/4, if not a full, blunt into my pipe, it's a good smoke, but compared to a joint, it's a waste. You still smoke it, but whatever. The down side of a metal pipe, well, put an open flame on a pan for a while then stick your finger there, they get HOT...

Go with j's my friend