Yes. I did some research, and here are the reasons I chose them.
Tenecor - I heard some potentially unsettling things about Tenecor - not just from ATM. I don't like the idea that the tank can be of differing qualities based on person making the tank in the shop. I would like to believe that a company as large as Tenecor is putting out the best quality every time. I heard that some of their long time staff (sales and manufacturing) have left recently, and there is a problem afoot in the comapny. Maybe just not the right tank manufacturer for me at the moment. It might be all rumor and inuendo, but it was enough for me to choose another manufacturer.
Aquart seems to not make all of their tanks. I bought a 300g from them about 10 years ago, and I thought I would repeat that experience, but I read some of the experiences here, and coupled with the fact that they don't make all of their tanks, I decided to pass.
ATM was kinda dickish. The guy I talked to at ATM (Dennis) was first to jump on reasons why Tenecor is terrible, blah blah blah. "They're going out of business and won't be around in another 6 months. I have 3 or 4 Tenecor tanks here now that I'm repairing." He then went on to tell me how "I want a racetrack tank for rays (bullnose at both ends so they don't develop nose cancer), and that acrylic needs to be thicker the wider it is." (No, it needs to be thicker the DEEPER it is.) It was easy to take this company and write it off. No way, no how.
Midwest Custom Aquariums - Chris was very pleasant each time I spoke to him. He said he makes each and every one of the tanks, and that occasionally, he is asked to make tanks for other manufacturers (hint, read above). He and I talked about the tank specs, thickness of acrylic, and that he takes pride in every tank he makes. He makes sure everything is right, and the process can take 3-4 weeks, but he doesn't rush it along for the sake of getting it out of the door. I had some good conversations with him and I definitely felt like he was a solid manufacturer with a good warranty. He said that in his 10 yrs of doing this, he hasn't had any leakers yet, so I went ahead and placed an order. I'll be sure to document everything, but I have a good feeling, for sure.