I bought a Mytee 8070 about 2-3 months
ago. I was able to find it locally, local support on a machine like this is important to me. I like the large rinse and recovery tanks, it is easy to operate and I get great results. It has good water lift, a long power cord and hose, is on wheels and is well built.
It is a bit heavy if you are going to be lifting the machine in/out of your vehicle (if doing mobile work) and the water does take a while to heat up.
I'm not familiar with the Aztec Hot Rod so I'm not sure how the 8070 compares.
This is a good machine in the $700-$800 price range, being part time I couldn't drop over 1K for an extractor.
Hope this helps and good luck.