I'm not sure why the options have become just R-Tech or Revo/Apr.
There's also MRC Tuning, Stealth Racing, Superchips and Racingline to name but a few.
Just because R-Tech have a big social media presence, doesn't mean they are the only company capable of producing a good tune.
I have experience of 3 of the companies mentioned and the best by far is Stealth Racing. Just putting that out there.