Alright, I just installed new pads and rotors on my E-150 cargo van. I bought the cheapest pads not thinking much of it. Really an E-250 would've been more ideal for what I'm hauling with this thing, as it's a decent bit of weight. I had the brakes get too hot on me last night on a delivery and I already slightly warped the new rotors. My question is, do more expensive pads stop better and stay cooler, or do they just last longer? What would you recommend? At 1,500 miles a week, I need something that can take the beating.