I went with metal unit since I am NOT a lightweight.
Kind of a no-name but well made with adequate flange and number of screw holes. Think it cost me like $57 plus shipping.
A couple of hints: Be very sure of where you want to cut that hole - got mine a little close to the seat post but it's tolerable. Plus, I can always fire up the welder and make a custom setback adapter for the 3/4" pin mount.
Secondly, do your best to figure out how much deck thickness you're going to be cutting thru... Took me 3 different tries with 3 different saws before I was finally thru the 3+" deck.
And then I still couldn't figure why it was presenting such a challenge to get that plug out of the deck. After much blue air being generated on my part and getting the first chunk pried out with a gorilla bar after cutting the chunk into multiple portions, I found that the flotation foam filling the nose was literally gluing the plug in.
Crazy - but has really went towards giving my back a break from the Capt Morgan pose....
One upshot was I did this in conjunction with the re-carpet job so I cut the hole after removing old and prior to putting in new carpet. Do something to seal up the cut in the deck wood before installing the tray. I just applied copious amount of carpet glue before wrapping the new carpet down the cut and then installing the tray.