Former Ricoh Solutions Engineer here. This is JUST MY opinion, based on my own personal experience.
Ricoh makes very good gear, and the C7500 is no exception. As to your questions:
- Any input on what paper types work or don't work. Can print up to 470gsm but I've had a hard time finding anything heavier than 350 and the few I have found are exponentially more expensive.
Most standard stocks will print very well, including coated and heavier stocks. Synthetics are sorta "meh", in terms of feed and potential imaging issues, but really all vendors' gear struggles with synthetics in this segment.
- Does the 5th color work well or is it gimmicky (mostly interested in white ink on black media, or clear coat to give an aqueous like finish)
5th color works as well (or better) than other vendors' offerings in the segment (Irridesse, Fuji Revoria, KM 14010). The C7500 is Ricoh's 2nd generation offering the ability to swap the position of the black & specialty colorants, so white can be run in 1-pass as an undercoat on dark/black stock with CMYK on top. This is a game-changer for registration, time and waste savings. Do NOT expect the clear to behave like an aqueous coating. It's not as glossy (not even close), and it would be very expensive to run as a full flood coat, if that's what you meant. Closer to "spot" aqueous, but still nowhere near as glossy. You won't want to use it, for instance, on top of photos. Almost imperceptible, since the prints already have a slight gloss to them. Rather, consider them as accents over the top of artwork (geometric patterns, shapes, etc.) or in white or "void" areas of a design, where they will be much more noticeable and appealing, IMHO.
- What software do you use - currently use Fiery Impose but this will come with JobFlow which seems it will help streamline a lot of the multi-up printing we do (business cards, 5x7 announcements)
JobFlow isn't an imposition solution. It's a programmable workflow tool. Think of it as "Hot Folders on stereoids". It can be customized, scripted endlessly using any language you prefer, (python, perl, even Powershell or batch file), and a it's client-server model, making it much more appealing in 2025 in terms of serurity, IT requirements, and usability. It can even be hosted on a virtual server (blade, etc.). JobFlow can *integrate* with Fiery Impose, calling impositions as a workflow step, but doesn't have this capability natively. Also, be aware that the free version of JobFlow has many limitations to everything I listed above.
- Will this be a significant step up in terms of color and print quality from my current 5310? Ricoh tells me yes.
I'd say yes. Sorry, but the C5400 is still a glorified office copier in "Production" clothing. Registration will be much worse owing to the lack of a dedicated active registration system found on midrange Ricoh's and above, and competitor's midrange models. Side-by-side samples may look very similar, but day-to-day running between the C54XX and C75XX models will be night-and-day: better/broader substrate support, faster and more consistent output (larger, more ruggedly designed paper transport/2nd transfer application, larger diameter drums, paper transfer belt/roller, etc. Also the C5400 touch-screen interface is a toy compared to the C7500's operator panel, which has design roots in Ricoh's high end continuous lineage.
Edit: fixed "PowerScript" to "Powershell".