Chester,
Check out Slydog Powderhounds if you want greater flotation. They are 7"wide and float very well. They also carve nicely and do not steer hard. Great skis if you don't ride like a maniac on the trail. If so, get C&A's. But 7" Powderhounds turn easy, help ease darting, and float like crazy. I ran these for years on my Mt Viper.
Slydog also makes an 8" Powerhound version, but that is primarily for deep snow out west. Being that your sled is a Vector, I'm assuming that is not your application. But they float really well. I run the 8" version on my MTX.
Another ski you may want to consider is the Simmons Gen 1 Flexi Ski. They are 6" wide but float really well. Simmons also makes a 10" wide Gen 2 ski and an 8" wide Gen 3 ski, but the Gen 2 and 3 are out west skis primarily. The Gen 1's are excellent for our terrain here in the midwest on these Yammi 4 strokes. Great floatation, great tracking, totally end all darting. I ran these the last 2 years on my Attak, but recently switched to C&A to try them out. But I may go back, we'll see.
The 2006 - 2010 Yamaha Mountain skis you refer to in your original post are also very nice, probably the best ski Yamaha has ever made. I used these on my Attak for a year prior to the Simmons, and I really can't say many bad things about them. But I also feel the Simmons Gen 1 or the 7" Slydog Powderhounds are better overall skis -- but that is just my humble opinion, but I have used all 3 extensively.
The key to any of the above skis is proper set up. They all can be made to be good. You need a wider ski for better flotation i'm assuming than the skinny stock skis provide. All the above skis respond well to shimming the rear of the rubber 1/4" on each ski and proper toe-ing out.
Take care bud!