SharkCAD Pro, also now owned by IMSI, has Keyshot link integration as well as default integrated Lightworks, and it also exports to a facet format, .fac, which is interesting because it's plain text coordinate list, human-readable, apparently devised by Lockheed. Tim Olson, IMSI's CAD director, and creator of Shark/TC Mac, was at Lockheed....I mention that because the .fac format is also the native format of Electric Images, a rendering and animation suite widely used in film as well as product design and presentation. It's USD 895, which seems reasonable considering the animation, and EI's site has a very impressive gallery. The learning curve for anything new is more and more uninspiring as I get older though. I guess choice of renderer comes down to how easy it is to use, how reliable the interoperability is, and, like TC itself, bang for buck. The linking and auto-updating/refresh wouldn't be a huge consideration for me because I've almost never rendered for documentation and presentation until after the modelling's finished.