Well, a lot depends on specifics of intended use and your preferences. However, in general:
For my .02... Bent Chetler.
I have only demo'd it for half a day. Likewise the Blog. However, two family members have used the Bent Chetler as a daily driver. As a whole, the family has hundreds of days on Hell Bents (both designs). I've used the current Obsethed design a dozen days or so.
For my .02, the Blog is inferior to the Bent Chetler. It is a good enough ski, but IMO the lack of tail rocker is a huge mistake in that design zone & very much limits its perfornance. Hell Bent is just a bit behind the curve & less versatile - but is still more capable than many give it credit for. Obsethed is a fine ski, but again, makes some trade offs I would not (I am not a huge fan of the "virtual" early taper approach taken with the steep tip kick). Although I could happily spend time on them.
As for the comments about effective edge - there may be a learning curve, but I know a number of people who can totally rail Bent Chetlers on firm snow - to the point of tracking free-skiing racers turn for turn. In one or two cases, switch. This is one where the issue is not whether or not the ski can do it well, but do you listen to it. The Obsethed may not have obvious early taper, but the steep kick means much of the tip and tail will never ever engage in former snow.
BTW - just to open it up more, K2 has some other interesting things - including today's Pon2oon which handles chop better than you'd think (but has that tip kick thing I'm not so fond of) - and may be more of what you want than the Hell Bent. Next year's Petitor and SideSeth are interesting. In terms of the brands you mentioned, there is much excitement about the Atomic Automatic and the Rossi Soul/Squad 7. If you are buying right now & can look afield, pricing on Praxis is crazy good (esp with coupon). Not sure where ON3P pricing is at the moment, but much to love there too... etc...