Ring flashes are of very limited use,and are basically a device popularized by a certain septegenarian owner/entrepeneur of a flash-company assembler-repairer as a way to sell more portable battery and sine wave inverters. I see no need for a ring flash for event/portrait/team photo work, in any way,shape or form; seriously, if you're thinking about the one I am thinking of from, it's largely a gimmick designed to sell more ancillary products. Good marketing and clever ads sell a lot of products,since so few people know much about studio flash,and the flash companies as a whole do very little marketing--except for the guy with the red hair, and ProFoto!
What I really want in a studio/location flash system that is one that is priced right, is professional looking, and also truly "professional" in terms of design, construction, accessories, and performance. A system that has actual, professional-grade attributes,and which can be adapted to multiple types of lighting jobs. For me, that means a system which can accept umbrellas, soft boxes, beauty dishes, parabolic reflectors, and most importantly, which can accept honeycomb grids in both a standard size "grid reflector" (7 inch diameter),as well as a medium-sized grid reflector (11.5 inch). The Calumet Travelites are professional monolights; the 'other brand' of monolights is designed for a much lower price point. Monolights are popular with many people, but I prefer the pack and head systems.
For me, Speedotron is the pack-and-head brand of choice for 70 reasons-- one for each full year of production in the USA, dating to 1939. You buy good light heads and they last for 40+ years. You use an appropriate power pack for the job at hand, from the 405 with 3 head outlets, 1.7 second recycle,and 400 watt-seconds, to the 2400 watt-second, 6-outlet pack. All with the same heads!