I was doing some research on STO and I stumbled across something odd. Yes I know this is nitpicky, but it should be a really easy fix. (Should be faster than the time it takes me to type this post.)
■Unique Registry Prefix (in-game item): Give your ship the coveted NX prefix, seen only on a handful of elite Starfleet vessels like the Defiant, 22nd century Enterprise, and Prometheus."
The NX prefix was not for elite ships, it was for prototypes. The Defiant was the first Defiant class ship, the Prometheus was the first Prometheus class ship. The only exception was Enterprise. Enterprise was a NX class ship, and was before Star Fleet starting using the NCC prefix.
Elite is probably used in the sense her of "being unique/special". First ships of a class are special and as long as their keep their NX-registry (i.e. their experimental status) they are unqiue within their classes.
Moreover, in business-talk it sounds cooler to potential buyers when you say "elite". I bought it right away.