If you ask anyone that I've squatted with, I'm the quintessential gear whore, so I like everything as tight as I can get into. I've heard good things about the overkill squat suits. I myself use the leviathan and love the canvas. I'm a wide squatter and generally keep a pretty upright posture. I've also seen guys get a ton out of ace squat suits. The briefs I've had the most luck with are metal pros underneath the leviathan. I've also tried predator briefs and they have to be the most uncomfortable brief I've ever had on...my hips were killing me with them. I've tried tight ace briefs and a lot of my training partners use them and like them but they tossed me around like a rag doll. But if you can dial them in, the weight flies up. I've heard some good things about boss briefs, but the downside is I hear they stretch out quick and feel like you're wearing sandpaper.
For shirts, I've never had luck with metal, everyone I've seen gets to about a one board and just hovers, unless you have alligator arms, it's damn near impossible to touch. The shirt I have had the most luck with is the single ply katana, it bites like a mother but the weight flies up and I get support throughout the lift.
For deadlift, depends if you're a conventional or sumo puller. For conventional I really like metal suits. For sumo, you can use your squat suit to get a ton of leverage out of it.
hope that helps.