I have zero experience with any of the manufacturers you mentioned, except Boaphile. I have nothing bad to say about any of the others, but I have exclusively boaphile tanks.
All 13 of my tanks are Boaphile tanks. I've had really good success with them. Jeff Ronne, the Boaphile, is a good guy and a straight shooter. He will tell you what you need given room temp, animal requirements, etc.
He does everything from helping you design the tank to installing all the heating elements, vents, etc. He also ships the tanks assembled (except for 6 and 8FT tanks which will come in 3FT or 4FT pieces that join easily).
I have not compared prices, but I imagine Boaphiles are a little more given that they come ready to go. For me, it was worth it in the beginning as I didn't know too much about the different options and wanted to deal with one person. After I had a bunch of his tanks, it made sense to keep going down that road. I have 3 stacks of tanks and have had them for about two years (give or take) and really like them.
Jeff is terrible with emails (he admits it too). However, he is great with calls. Call the number on his website and he will answer or call back in short order.