Good info, thanks. I've passed up a couple of deals on Vipers - piped and loaded. One was a little over $3000 and the other wants $4000 (mountain). I just don't think they're what I'm looking for - a good cross country machine for boondocking, trails, non-serious mountain.
I really like the SRX for the trails but in my rider groups' experience, they are a terrible off trail sled. I'm not sold on the RX1 for off trail but the new Attack looks like it might fit the bill but hard to justify the $$$ for what little we use them. Also had a Mountain Max 700 but it just didn't have the power we're used to. My long track SRX would totally outclimb it in the Big Horns and the MM would seem to power out a lot sooner in deep stuff.
I hate to say it but some of those Cats seem pretty nice for that. I visited with one guy who has a Cat 800 EFI Cross Country and also an SRX. He claims the 800 efi outperforms his SRX in every catagory, including speed. I suppose he could be right, after all, it is an 800 against a 700. Then I visited with another group who had both Cats and Yamahas (Mountain Viper and Mountain Max) - they said each (Cat and Yamaha) were great sleds and had good points and each make rode different. They felt the Cats were better for off trail.
From what I've seen in the mountains, Yamaha is definetly in the minority.