Once Las Vegas loot could go to your Wishlist, 8 drop items - known as the Wishlist Elite Eight - were elevated to the top of the class in terms of attack and defense stats, as reviewed in this recent post.
A long standing debate involves whether the better strategy in collecting loot is:
 Build up your overall attack and defense stats, into the 110,000+ range by getting 501 of every item on the Elite Eight (or a few less, since some boss and challenge items from each category have higher stats)...
 ...or building up your "core" stats by getting 501 of the four items (one Weapon, one Armor, one Vehicle, and one Animal) that have the most COMBINED attack and defense stats. Colin did an excellent analysis of what it takes to win the Vegas tournaments in this post.
If you subscribe to theory , then this post's for you. The Wishlist Final Four are the best COMBINED-STAT items in each category, which are:
Honorable Mention: Goldsmobile (95), Day Rider 2K (95)
Honorable Mention: Ripper Assault Rifle (87), Plasma Rifle (87), Arcturion Assault Rifle (86)
Honorable Mention: Cooling Vest (92), Ares Power Armor (91)
Honorable Mention: Bighorn (90), Gila Monster (84)
Given that the Wishlist Final Four are all part of the Elite Eight, it's not like you have to choose one set of items of the other. It's a question of which items you are trying to get the most of, if you trade or put on your Wishlist.
And the answer, truly depends on whether you are a fighter or a boxer - that is, whether you use your stats in the fights available in each city, to collect Victory Coins, Fight Club levels, and drop loot, or whether you use your stats in the Vegas fighting tournaments every four hours to collect belts, rings, trophies, drop loot - and the best available Stamina:XP ratio in the game (more on this in a future post).
Of course, you can do both. But if you are focused on winning the Vegas fight tournaments, especially the Heavyweight tournament, then loading up on Ballista Missile Launchers at the expense of other vehicles - is actually going to hold you back. Why? Because the 62 attack is coupled with a paltry 17 defense, for 79 points.
For combined stats, the Ballista - which is the least frequent drop in District 8 - is actually the WORST vehicle in high-level Vegas. You're better off with the Foo Fighter (96), Goldsmobile (95), X-22 Peregrine (87) Performance Sports Car (85), or Amphiquad (82). None of these Vehicles have the most attack or defense points - but all have better combined stats than the Vehicle with the best attack stat.
Food for thought...