I'd say the A60. Reason being the other two have half the estimated switch life (10 million vs 20 million clicks).
Also, the other two are Xglide models and the A60 is a Light Strike model, which means very fast response time. That is something important in shooters, especially when playing online. The other two don't even show on their main page anymore and are older models apparently. The A60 seems to have every feature the others have and plenty more, and the features it shares in common has more of, like snipe modes.
The A60 is also higher DPI and the onboard switches on top allow you to adjust DPI on the fly. Each setting also lights up the scroll wheel with a different color so it's very easy to see which DPI you're on. Being higher DPI also gives you a broader range. Even if 4000 DPI is too much for normal shooting, in some games things like turrets (or less commonly sniper scopes) are very slow to move, so having a high DPI setting can be useful in some cases. However do note that it has only fixed DPI settings you can use, so make sure the DPI settings work for you.
That said, if you have a mouse now or can gain access to a store that has various popular models on display, take time to see how well they fit your hand, then measure the length, width, and height of the better feeling ones and compare to the dimensions given on the Bloody mouse page. A mouse that doesn't fit your hand well can be problematic.
It's been harder for some time now to find stores with such displays, and lately with the Corona virus outbreak, you may not even find any, so be prepared to ask friends to measure their's and maybe let you get a feel for them, after you thoroughly wash your hands of course, then again after trying them. Never can be too cautious in such times. 😉