If you love recordbox I’d and only need 2 channels I’d go for the RR. I just stated using the rx and the dedicated controls make using it easier. E.g I carry thousands of tracks that I never play but if someone asks for one and I need to beat grid it, with most tracks it takes seconds.
The bar I work at also had cdj900 so I could use RB with those should the controller fail or if there’s not enough room in the booth which is one reason why I switched to recordbox.
Either way you’ll get a good controller