Here is some additonal information I found online about the New "yet to be released" Alpacka "Orca" packraft.
First a couple of quotes, from random Packrafters, about the "Orca"..
"...He knows more about the Orca and comes from a hardshell background. I donít like it. The thigh braces scare me and I donít want the bulk of the frame on a long trip. For my needs, the Llama is the right white water boat. Right now my limiting factor is the boater, not the boat! I think all inflatables will fall short of hardshell performance in boiling rapids, so that there isnít much reason to go Orca over Llama. February 11, 2012 at 9:10 pm..."
"... Not so much of a surprise, we have seen the new white water boat (prototype name the Orca). This will come for sure. Question is, if this still resembles a packraft? It is going to be below 4 kg and will be very much packable, so yes, taking such criteria it is. However, its intentional design is not for classic packrafting as combination of hiking and boating, rather be a white water travel boat.
It is not meant to take a pack for example. Uhh, kayaking folks donít hike anyway
If you have seen Wayatt's great video with it in Costa Rica, you know what I mean. It has its heritage in the packrafting evolution nevertheless.
Hard facts are:
it contains a massive frame of coaming
with strong thigh braces
made of special material (no stretch)
for maximum tube pressure (pump required)
has extra slide protection on the bottom..."
Here are a couple of links:
Wayatt's great video with it in Costa Rica
Packrafting in Europe: Visiting Alpacka
Personally for me, so far, I am leaning towards the Alpacka Yukon Yak, designed specifically for packing into the backcountry and kayaking moderate white water. I'm with CasperMike, if I'm going to be running difficult white water, I'll shoulder my Fluid Bazooka and hump it in, knowing I'll have the required equipment for more difficult situations. Seems to me the "Orca" with it's added weight, doesnt make sense to me, for the type of packrafting I'm wanting to get into.