I've got a pair...sounds like just what you need.

The Mantra and ObSethed are quite different. I think you should be benchmarking the Gotama to the ObSethed for a better comparison. I ski last years Seth at Crystal everyday and love it. It is a little on the softer side and I think the ObSethed will feel even softer due to increase rocker in the tip and tail. The Mantra is a freight train on the groomers so you'd be sacrificing there...but with the rocker and the width...the ObSethed will be loads better in soft snow. At the end of the day it really depends on how much you care about performance on hard pack...if it matters alot, I'd look at the Gotama or Mantra. If you want to dominate the pow...go with the ObSETHed.

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Do they fit your feet? You might want to try them in a shop before you order them. These are relativly soft boot, not that there is anything wrong with that, but people who buy these should be intentionally looking for a boot that isnt too stiff.

Really depends on your definition of all-around. If you're looking at a 50% park ski both the ARV and the Bridge would be good, but both are a little narrow to be great in powder. If you split your time outside the park between groomers and powder you're going in the right direction. If most of your time outside the park is spent searching for powder or in the backcountry...you might want to step up to the Gotama (unless you ride a lot of pipe). I've never skied a Scott ski so I really can't comment. I would probably give the nod to Volkl for all around performance, but Armada's are great in the park. I ski the pipe cleaners, but the only park riding I do is on a freshly groomed halfpipe...and honestly...that's a rarity.