I would go with h-beam rods purely based of their strength. But I don’t think you would go wrong with the I beam rods from p2r. As for pistons…. Weisco has always been my go to.
I liked it a lot. It’s portable but I’m strong. I can put it in the back of my truck. My wife who works out every day can’t lift it very high. It’s quieter than the predators. It has a setting to run itself out of gas for long term storage too.