Thanks for all the details!
regarding the Omni, it can be hard to know if everything is set correctly sometimes. You have to
•check that your computer (Windows, right? Works with Mac too) is outputting to it as a 5.1 Surround device (or 7.1 if available),
•check your Omni software suite settings (I’d recommend starting with Surround at 100% and Smart Volume off, turn off the other enhancements too but after you get used to it you can turn them on one-by-one to see if you like the effect)
•and then in Apex you want to make sure it’s settings are for “home theater” and all the speaker surround settings.
That last bit might sound counter intuitive, but that setting will be the highest quality, and allow the Omni to have the proper split of directional signals to do it’s work. If Apex is set for headphones, then you’re only sending two “directions” to the Omni anyway, and furthermore Apex might be adding some of its own processing on top of the Omni’s processing, which usually is a bad thing.
The Super X-Fi is more advanced and allows you to customize for your headshape, so I would be interested in how well that works for you! Your smartphone is probably only sending it 2 channels (two directions) so at best it can just sound like two speakers in front of you, so the real test will be after you get home and try playing a game. On the upside, glad to hear that you at least have found a portable piece of equipment that improves the sound quality compared to your phone.
By the way, I haven’t tried updating my Katana’s firmware yet... just used it out of the box with Optical to my PS4 (Dolby decoding and headphone surround! I was surprised!) and Bluetooth to my phone and computer. Any suggestions on what not to do? Hah! My headphones sound better than the Katana speakers, and my Chane bookshelf speakers (about the same cost for the pair, but I also needed a DAC/Amp) in the living room sound better too, but the Katana beats my iMac speakers and it’s an easy option when I sit in front of my computer at my desk. It’s like a big Bluetooth speaker, with a subwoofer. I need to change the battery in my remote.
I love when a headphone gets close to letting you forget it’s there, and let you feel immersed in your media. That’s why I do all this! Have fun!