Arista 100 film isn't the best for resolution either. Dye clusters are somewhat large and diffuse. Here is a full-frame 35 mm picture (a runoff into Water Canyon) and a detail section I scanned at 4000 dpi.
I should also mention that the Arista film base is somewhat thinner than either Kodak or Fuji products. The thinner base makes it more difficult to achieve the slight curl that is necessary to load Nikkor reels, but other than that problem, it doesn't seem to matter.