Just my opinions .....
I have both the K2 Mod X (same as Axis X) and the Bandit XX in similar lengths. The K2's are my older rock skis I use the Bandits at all other times. The K2's are softer but the Bandits are more stable at speed. The K2's are easier in the bumps but neither are as good on real ice as say the Atomic SL 9.12 (another one to consider).
Bandit XX - Fast, more aggressive, big GS turns. Good on piste and in powder.
K2 Axis X - more relaxed, smooth, less demanding and easier on your body. Good on piste and in powder. You might want to go longer there is a K2 sizing sheet somewhere (I'm sure Gonzo knows).
Atomic SL9 - Great on boiler plate, forgiving yet stable, agreeable in bumps. Go short. Didn't try in powder but have heard that they are not too bad because of the wide shovel and tail.
Also heard good things about the other ski's you mention but never tried them. Another ski to consider - Volant Machette Soul heard it's good in bumps, hard snow and soft snow but prefers short to medium size turns. Another thing to consider is the binding - some bindings can make the ski harder and softer, some bindings move fore and aft changing the performance of the set-up to match the hard & soft conditions better.
To be honest if you get a lot of powder on the occassion trip then rent a wider powder ski - it's worth the extra grins.
DB[ October 30, 2002, 12:53 AM: Message edited by: DangerousBrian ]