I was looking at the CG130-AR initially due to size requirements. But, since we print a lot of holographic media, it can be a pain in the butt on registration marks. Helped another print shop set up one of the FC9000's and both the speed and the white light registration mark system really impressed me.
At the moment, we're actually using a dirt cheap US Cutter LaserPoint 3 53", and it's surprisingly good for the price. Not recommended if you're doing multiple cut types however, as you have to catch the transition and manually set the pressure. If you're just doing contour, crease or perf cuts on a job, not too terrible. The thing essentially has no safeties or sensors, so it can throw a sheet and tear it 9 ways to Tuesday and just not care. That said, for the size and price, Mimaki is very competitive on the AR series, about the cheapest I know of for the price with pretty much all the features of their FX series. Speeds cap out about half as much as a newer Graphtec (at least in specs), but they seem quite capable.
Figure out what features you want and go from there. I imagine you want ARMS or ID cut to save on alignment. Speed, volume, and other features will determine where to go from there. If you want to go really fancy, Summa seems to have some amazing features, but not played with those in person. If you need a creasing tool, some package deals offer it, but they can be sourced on their own (Mimaki's OPT-C0243 mostly plastic creasing tool is $90, a genuine all-metal Roland dual tip CRT-2 is $99, knockoffs way cheaper). I've even stuck a piece of metal rod inside an old knockoff blade holder and filed it to a point to use as a crease tool in the past. The little clip-on table platform pieces are nice, but not all that necessary. If you want a sticky backer sheet for cut/crease jobs as well, can use knockoff Cricut style sheets too. As long as your software of choice works with your cutter, there's not many 'wrong' choices here.