Yeah, the LA1055 + HD bucket is a good combo. When I was moving the dirt pile left over from excavating our house and got a bit aggressive, managed to lift the rear even with filled tires(~800lbs) and ~700lb flail mower on the back.
Can speak highly enough of the Grand L, between HST+ and the weight over the standard L they're great machines.
Wow!! The machine I had today would not quite lift the rear end with just a box blade on the rear (no ballast in tires).
I checked the bucket again and it says it's a "Light Material" bucket not "Light Duty". Not sure what the difference would be though.
I really like the HST+ too. Plus the tractor just sounds good as it's operating. No weird noises that don't sound right.