New Skis advice

I have not skied the Hannibal or Cho Oyu but for what you like to do they look like excellent choices. The lighter construction skis generally do not ski as well in a variety of conditions (heavy snow and funky conditions) and at higher speeds. You will notice the difference in width & flotation compared to your V6's.

Between the Hannibal & Cho Oyu, the Cho Oyu has more sidecut / tighter edge radius. Something I like but is not for everyone. Generally easier to initiate turns.

Find a way to try out the skis you are interested in, even if it is difficult or expensive to find a pair you can demo or borrow. Get a lift ticket and ski them in the widest variety of conditions you can find, preferably skiing both on the same day so you can compare. It will pretty quickly become clear what you prefer to ski.

If you spend any time lapping powder with friends I'd hang on to the V6's or replace them with a wider ski.

I'll throw in my two cents... I've been recently looking for a replacement for my Dynafit Manaslus... never really liked them, but would like to find something just as light if not lighter with a similar waist.
I was thinking about the Cassiar 95 too...but oof! thats a hefty pricetag for those.
I've got a pair of BD Carbon Converts that I think are fantastic skis...if the Helio 95 came in a length that worked for me, I'd probably get it, but with its 10cm jumps between lengths, I'd either be going shorter or longer than my usual ski size.

You might wanna read some reviews on these two boards - both have a 95mm waist and are lightweight construction, though the Blizzard is definitely the lighter of the two.

Blizzard Zero G 95
Salomon MTN Explore 95

I have the Salomon MTN 95, and think it's a great ski. With the tip profile it does excellent in powder as well. For the serious mank days I have the fatter MTN labs, but really was suprised how well the 95 does in all conditions. Previous skis were volkl nanuq, atomic kailas. Skis just keep getting better! I tend to stay away from superlight skis. A little heft is a good thing. Save weight by getting dynafits without brakes and watch that your boots aren't too heavy. Again, I prefer the down over the up and prefer a medium weight boot.