Both Droidworx and Cinestar will do the job and are constructed from high quality materials, I own versions from each company. As Denny notes some of the Chinese manufacturers are starting to catch up in terms of build and material quality although most of their designs are slightly modified copies of the high end brand name frames.
If you plan to use the frame for business purposes, consider the ability to obtain parts as part of the decision, are you able to wait a week or more for parts to arrive from a single source in China, or does it make more sense to buy a frame that has parts stocking vendors world wide. I've been able to quickly source any parts needed for my Droidworx frames from several sources, a definite plus IMO. The Cinestar also has good parts availability although I have to say I have not needed to replace any parts on it so far, that includes having sustained one moderate crash from roughly 30 feet in altitude and a couple tumbles on takeoff and landing, the Droidworx I've owned longer and has taken a few harder hits.
Ken