One thing to consider with the Omega is that I think they don't work with certain Kadet (.22LR) adapters...or maybe all of them, I'm not sure. Also when the Omegas first came out, I think they had a problem with a spring popping out of place or something. I don't remember the details. I was always happy enough with my standard 75 triggers, especially if they were tuned a bit, and they're reliable. And I shoot Kadets a lot so I've never considered an Omega model.
I'd recommend trying to get your hands on a few models and see what feels right to you. A lot of people love the SP01s, but some, including myself, prefer the standard frame 75s. I've owned a standard SP01 and an SP01 Shadow Target and sold both. The SP01s will tame recoil a bit more, but of course the balance is different too. The standard 75 frames are a little lighter in the front, and a little faster to move. But to each their own.