im not a fan of anything in the pathway of my signal - to have the most robust you can have will be using just the digital coax, any additional connectors has the potential to add resistance to the overall cable system...
the main issue is with the length of cable and its quality, we are using fairly short lengths in our flight cases so that helps, if you had preferred the right angled connectors i would have gone with this as the connector on my cable as fitted at manufacture...
if you must use those connectors try get the best cost / performance ratio that you are comfortable with.
being a digital signal, you will soon notice any issues using the connector is in place... it with either work or it wont! :)