I hope I'm not too late on this, but I'm going to chime in with my $0.08 (Hey, I gotta get a little more for my opinions now that gas prices are out of control again!). LOL.
I would go with ARB/OME 1000 times before I even considered thinking about going with Calmini. Yes, Calmini makes a quality product, if you overlook their shoddy powdercoating that flakes off during shipping, and their squeaky suspension bushings that require you to add Grease Zerks in order to shut them up.
I am a firm believer in Customer Service. I would rather spend a little more money dealing with a company that has top notch customer service like Slee (retailer for OME Suspensions - at least for Toyotas, but I'm sure they can get Trooper stuff, too, if you ask them real nice, hehe). If you search around on some of the Nissan and Suzuki forums, you'll read a lot of horror stories about Calmini's customer service. There aren't any inherent problems with their parts, other than the minor issues I stated earlier, and you can order them without powdercoating. I would not hesitate to order Calmini parts through a 3rd party reseller, however I will never, EVER, personally deal with Calmini ever again.
A good friend of mine ordered a set of lift shackles for the rear suspension of his Frontier from Calmini. 3 weeks later, he hadn't heard anything from them, and they had billed his credit card the day he ordered them. He called them up and informed them that he was shipping out with the Peace Corps for 6 months overseas, and needed to have the shackles in by the time he left in order to get his truck out of the parking garage and into storage (it was already taken apart awaiting the new shackles (and some other bits he had ordered from other places that had already come in). Calmini informed him that his shackles were at the powdercoaters and should ship out by the end of the week, and they would email him with a tracking number when they shipped. 2 more weeks passed by, and still nothing from Calmini. He called them back and asked them what the hold up was. They gave him the run around and transferred him back and forth between several different people before hanging up on him. The next week he shipped out, still no shackles.
Since he was living in an apartment at the time, and could not receive large packages, his truck parts were being shipped to my house. I told him to bring his truck over to my house, and I would keep it there for him while he was overseas. A couple more weeks pass by and still nothing from Calmini, so I called them and asked them, not very nicely, what was taking them 3 months to ship out a set of shackles that should take all of a half-hour to fabricate. I told them that the order had been placed by a close friend of mine who is now overseas with the Peace Corps and that we were very disappointed with the level of service we had received from them thus far. The guy on the other end started asking me all kinds of questions about myself, my truck and other stuff that he had no business asking about, and then started to berate and belittle me for owning a Pathfinder. I told him to "go suck an egg" (in not so nice of terms), and hung up the phone.
I called Spencer at Spencer Low Racing and related my Calmini horror story to him, and ordered a set of Frontier Shackles. He overnighted me a set of his heavy-duty shackles at no additional cost. I installed the shackles the next day and called Calmini to cancel the order and request a refund. This was 2-years ago, and even after filing in small claims, he still hasn't gotten his money back. Avoid Calmini at all costs, their business practices are far from ethical and their customer service is among the worst I've ever dealt with.