I had the RR, aside from the brakes the other main weak point are the wheels, absolute trash according to the reviews, aguy I know also has the 22 R and destroyed his rims within a couple of months. I swapped mine for DT Swiss before riding. I also changed to a 200mm Reverb (don't think there was much wrong with the OnOff, must not long enough). I also changed the bars, stem and tyres but think that's more personal preference (prob wants a tougher casing on the rear) . Was going to change to 170 fork but unfortunately had to sell it
The XR looks mint, wheels are much higher spec but don't know what they're like. If you like playing with graphics and stuff though the carbon R is a blank canvas, I was going to go for neon pink fork, shock and possibly downtube graphics to really make it pop! Slik said they could do a neon pink chrome foil.....