saying "Begin" seems a good alternative for "Fight", it sounds less aggressive. I especially like the voice and the kind of echo, just the style in general. It is not so much distorted, not so robototic-like .. simply fantastic. great job.
From what I can hear I don't have any objections to redo many or even all existing nexuiz announcer sounds with your voice
The following would be great: you could, for now, release the sounds you uploaded as a higher quality version (or, what would be even better, if you make them having the same volume as the other existing announcer sounds like "3 frags left" so that the mixing makes sense and your sounds don't appear too loud). I can then create a proper pk3 file, integrate the sounds into the mod and have the servers that use it to setup a auto-download for this package, so that clients download it into their cache automatically.
It wasn't my fault.