There's a magazine for everything...
Forget Practical Horseman or The Doors Collectors magazine. If you want specific, check out Church Production magazine. Billed as the "Educational Magazine for Houses of Worship Covering Audio, Video, and Lighting Technologies," this seems to be geared towards those scary Baptist mega-churches with congregations the size of towns.
The ads in this magazine are obviously specialized for the audience. Audio mixing boards with headlines that read "Expand your Ministry," (of course, when I think preaching I think sound systems worthy of Madison Square Garden). One video system has the header "Talk about intelligent design..." (no comment). How about "is your praise music getting more complaints than praise?" or "it takes more than faith to hold up a top quality projector."
Wow...I had no idea.