I ended up getting the Flysky Noble NB4. I figured since it seems to be one of the faster transmitters, if things still seem a little laggy it will all be in my head.
Contrast the couple of milliseconds you could gain with a flagship radio to servo speeds: can a human tell the difference if the servo turns 60 degrees in 0.060 seconds or 0.058 seconds? I highly doubt anyone would pass a blind test when it comes to differences this small.
If you have a good basic radio or something in the mid-tier range, the radio is not going to be the thing holding you back.