I do see the 3880 supported as an individual channel option in StudioPrint. I'd say follow Aaron's advice, though I have no experience with the Wasatch. There are many settings to dink with in StudioPrint, though I see the defaults for dot sizes and light ink settings may be good starting points. These things can bury you in a world of tweaking and testing, perhaps the Wasatch gets you there quicker. If either or both allow a demo period, I'd strongly advise that, there's nothing like hands on. Regarding the limiting and linearizations, even those choices aren't simple and require testing, they will also heavily impact the quality of your resulting CMYK profiling.
Without getting into all that, I'll just add this, which may help determine if you want to go down this path-
It's true, I think I got somewhat more accurate results with cmyk and n channel tweaking and profiling. There are MANY settings to explore, and many gotchas as well. Much will depend on the screening quality of the RIP, and it's color engine.
However, there are ink densities and combinations in Epson's screening that just can't be reached with a RIP, and I spent years and brain cells trying. So, even though I think I had marginally better accuracy, and deliniation between very close colors seemed better, saturation of Epson's RGB screening just can't be hit. If that's not your priority, maybe that's not a big deal. But given the options to make and optimize RGB profiles, I finally went with the RGB option with Epson's screening provided in the RIP, for normal color work on inkjet papers.
Of course, printing color on something like Arches Cover is an entirely different issue... you can do things with a RIP and CMYK(+) you can't otherwise do...
intelligent use of dot sizes and light Ks, along with heavily limited colors, and again dot size control and light inks, and full GCR and gray optimization will get you low gamut setups for B&W work far surpassing the ABW driver in quality and control.. these kinds of things, and maybe specialty Piezography setups, are for me what sets RIP work apart. Otherwise I'm not sure they are worth all the excedrin involved... if you love the ins and outs of putting ink down, it's printmaking stuff...