I was able to drop my 4 output distribution amp when OTA switched to digital, in fact with the amp I had occasional drop outs that went away when I replaced the amp with a 4 way passive splitter.
I didn't know TrailTV went out of business
sad to hear, if they didn't have it they were always happy to order in what you wanted.
I also agree with the Ness recommendation but as mentioned they are a work hours
only shop, I make it a long lunch hour.
AFA converter boxes, if your TVs are just SD then a CECB is all you need. The Channel Master CM-7000(with S-video output) is probably the highest rated with the Zenith DTT-901(or Insignia clone) being a very close second. Personally I didn't like the Digital Stream(sold at RS) or other lesser known brands. I had mine hooked to a HDTV so resolution was very important to me, hooked to a smaller tube TV they would all probably look fine but the two I mentioned are also known for the best reception.
Not really sure where to purchase a CECB anymore, most I've seen are the cheap RCA or similar from places like W/M or similar. I've seen the occasional CECB at the large Pawn America in Burnsville but it's rather hit and miss. They generally go for $20-$30.
BTW QAM is digital CABLE, ATSC is digital OTA. Generally all devices with a ATSC tuner will also tune QAM, I've never seen a QAM device that also didn't do ATSC.