Hey Marcelo...I can understand your frustration with Polaris but, if you are committed to switch brands, you might want to check the shootouts & field tests before you buy an AC. The articles I've read seem to favor the Grizz & Outlander over the AC. I don't know how many options you have in your area though. Congrats on completing the Andes 700 mile trip! How did your 550 hold up in comparison to the other bikes?
The Outlander is a fancy machine, but the local representation is BAD and getting spare parts is a problem. I have heard of several problems with suspension, they SEEM as not as tough as our expeditions demand. Plus, IMO too much electronics; when you are 400 miles from the nearest inhabited place you don't want a computer going wrong. That's why the 420 Honda is so popular down here among hard-core outdoor riders. You just gas it and it works; nothing fancy, not great power, but nothing that can break and leave you stranded, plus, it is light in weight and you can lift it easily. Only problem I see is it lacks space to carry baggage for long trips. As for the Grizzlies, they do have a nice reputation down here; the representation is so and so, though. There was a global recall for 550 and 700 Grizz in 2010; apparenty the steering bar would break. Users learned about it through the web; nobody from Yamaha here called them. But it would be a good option. I am discarding the Arctic Cat 1000 because fuel consumption is OUTRAGEOUS (a friend of used a full tank -22 liters- for 100 kms) and besides the money issue, it is simply a logistic complication when I have to plan a 700-mile trip with almost no refueling options...I would need to carry with me 40 gallons of gas, and it ain't practical. I am looking at the AC 700 LTD.
The 550 was flawless, and I have to say I regret having changed it; oh boy do I!! It handled everything; at 15.000 feet high and with 400 pounds of cargo (160 was me, and 240 the baggage, fuel, and goodies for the indian school kids up there) it kept climbing with no hesitation. In the extreme conditions we had up there, I have to say the ATV's that better worked were the 550 and the old and reliable 500 EFI workhorse. One Outlander burned a fuse and lost 4x4 traction, and a Polaris 800 cc kept having problems with the fuel admission system and stopping every 15 miles or so (again, a problem I have seen in several 800's).