I use semi-professional recording gear and am also adept at editing and mixing audio files. I'm fluent in English and can imitate many of its accents (such as North American, British, Scottish, Irish, etc).
My experience in voice acting is fairly limited as of now. So far, I've voiced three characters for 2 video game mods (check below for link).
Depends on the project.
I've recorded a major NPC for well known mod for the PC game Vampire: The Masquerade - Bloodlines, called Clan Quest Mod. The version where this NPC is available isn't out yet, but the author made a preview here:
http://www.moddb.com/mods/vtmb-clan-quest-mod/news/next-npc-preview-for-bloodlines-sabbat-mod