Add Chess to that list, people argue constantly about which is the best set and which style of pieces are the right ones.

I just bought a 20 dollar vinyl board and some plastic touranment staunton pieces from ebay - the exact same ones the local chess club uses.

I'm also into Cycling and it's much the same there as well, My carbon bike was £800 and I ride it 2-3 times a week, I have friends who spent £4000 and ride it once a month (and have to have full carbon everything) always struck me as crazy but it's their money.