I would really reccomend going with a better company, someone like Golden Horizon, especially since you're talking about that much money. I use to use integy stuff until I had a problem and learned that they treat their customers like dirt. I thought it was an isolated incident but I started to ask around and do some research and learned that Integy is famous for treating its customers poorly and having horrible customer service. If you have a problem, you can't even call and talk to a human or email them. You have to use a ticket system, and it can take two weeks before your ticket even gets pulled. Then if you have a problem the next day, you could have to wait that long again. The customer service rep made it very clear to me that they didn't care about having me as a customer. I bought some parts that were machined wrong, waited three weeks to get in touch with them, and still didn't get any service. With some of the more reputable companies like Golden Horizon or East End Machining, if you have a problem, they will send you a new part first thing just so you don't have to wait while they try to figure out what went wrong, what caused the problem, etc... Golden Horizon also offers a lifetime warranty on their products. I think that if it's a truck that gets driven, then aluminum arms are a bad idea, and RPM is superior. But if you're going to use aluminum, Golden Horizon is number 1 in my book, and their customer service is unmatched. If you ever bend or break a part, they'll send you a brand new one, end of discussion. That's the kind of service that makes you feel like the company appreciates your business.