It s crucial to note the RP2000 doesn t have distortion or overdrive, per se. If you want dirt, you need to choose a model. To get dirt, choose from among emulations of amps like blackface and tweed Fenders, Mesa Boogie and Dual Rectifiers, Vox and Matchless-type Class A amps, and of course a Marshall JCM900. Once you pick a model, you can adjust the distortion level accordingly.
Some models offer tons of saturation, others only offer a hint of edge.
They are usable tones in studio applications. However, I own a Matchless amp. I own a blackface Fender. I have had the pleasure of cranking them up until the power amps saturate. These models DO NOT sound exactly the same.