Well, here goes with my opinion. Take it as what you may.
For training:
Frantz double groove briefs. I have grown to really! like there stuff. Great product, and a great turnaround. The z suit is gonna be a pain in the ass to wear. Even people that say they like theres complain about how uncomfortable they are. Just stick with the Frantz groove briefs until you start to get up to 700 or so and then you can experiment with the canvas. They are hard to get right. I got one and am gonna end up getting rid of it. I outgrew it. Plus if your big, they are a pain. You can't breathe in them.
Deadlift: Well people go both ways. The people I know who have actually tried a purpose built deadlift suit say that it adds 50 pounds. I haven't and most people that haven't tried one say that there is no way it could add 50 pounds. I think this is something that you will have to figure out yourself. The two that I would consider are Inzer and Frantz.
Erector shirts are kind of a tossup. You could try one out. But before you get one I would try the other equipment, you may find you don't need one.
Good luck
For training:
Frantz double groove briefs. I have grown to really! like there stuff. Great product, and a great turnaround. The z suit is gonna be a pain in the ass to wear. Even people that say they like theres complain about how uncomfortable they are. Just stick with the Frantz groove briefs until you start to get up to 700 or so and then you can experiment with the canvas. They are hard to get right. I got one and am gonna end up getting rid of it. I outgrew it. Plus if your big, they are a pain. You can't breathe in them.
Deadlift: Well people go both ways. The people I know who have actually tried a purpose built deadlift suit say that it adds 50 pounds. I haven't and most people that haven't tried one say that there is no way it could add 50 pounds. I think this is something that you will have to figure out yourself. The two that I would consider are Inzer and Frantz.
Erector shirts are kind of a tossup. You could try one out. But before you get one I would try the other equipment, you may find you don't need one.
Good luck