That is a Great Question Dan
My first Gold 1/4 oz was a Canadian Maple leaf and their highly recognized bullion coins, But looking at the 3 coins you've narrowed it down to, You really can't go wrong with any other them. But its good you are taking in to count what they will be worth in the long run. Looking at it from that point then, you'd be narrowing it down to either Queens Beast or the Lunar Monkey, And its funny just the other day I was looking to purchase one off the same coins you have mentioned and before I made my decision i looked into what sort of mintage was made, Sorry but don't think you mentioned which Queens Beast but I'm assuming either The Lion or the Dragon, I didn't find any mintage numbers for the Queens Beast, but I do know the Perth mint officially declared a mintage for the 2016 1/4 oz Gold Monkey of 12,833 coins. In which I'm assuming the Royal Mint would have produced a lot more than 13k, so I personally bought the 1/4 oz gold Lunar Monkey, My apologies for the long winded personal recommendation.
But good luck, can't wait to hear what you picked!