Last year I was in you same position. Wanted a ski that I can approach with and one that will work with my plastic boot. Also, I am not all that great of a skier. So, I went out and got a pair of Silvretta 404s attached to Atomic Touring Rainier 175s. Getting up the mountain everything went according to schedule. Going down, I looked like an idiot. I don't know if it is that the bindings were put on to perform more like a cross country ski or something else. I recently bought a pair of AT boots and tried them on my Atomics. Still no improvement. Maybe I really suck at skiing or I am not getting along with my Silvrettas. I am 5'10" at 185. After all this, I have purchased a real AT setup and looking forward to being able to ski again.
Hope this helps.
Dave