Honestly I don't think that you are on the right track. The Extreme( ie.PE) is not what I would be suggesting you to be checking out, especially if you don't want something that chatters at higher speeds. The other two skis that you mention are both very good skis with a specific purpose in mind. The ARV is a relatively soft ski and IMO if you are an agressive skier you may find that it will not provide you with enough performance. Out of all of the skis that you are checking out the obSethed is the best fit, although for some this may be considered a bit wide for an everyday ski.
If you do want a ski that provides you with good crud, powder, BC and on trail performance you should really be checking out a couple different skis. For one the
LINE Prophet 100 would be close to the top of my list. It is 100mm under foot which provides you with a great starting point as an everyday ski for the conditions that you had mentioned. You will be able to the Prophet in a wide range of speeds while be more then comfortable in the ski that you are on.
Another great ski that you should be checking out is the
Dynastar Big Trouble, which you can still find this time of year at a great price. The Big Trouble is a bit more of what I would consider a freeride flex, being that the tip of this ski is as stiff as some of the stiffest skis on the market. Ultimately this makes it so that you will have the ability to punch through some very broken conditions or rail turns confidently.
Check it out,
S_C