Welcome to flyertalk el_silver!

You got to do what the boss says you got to do. My experience is that no wheels is faster and better, as long as you are not carrying bricks. I have a 21" convertable redoxx air boss, and a small laptop backpack for my laptop. The *A flights I use have never bothered me, even when flying Y.

I normally don't fill up either bag, so there is room to move things around if needed, or if I buy something when travelling. So far, the only time I was hassled was, at LHR, when they were unbelievable restrictive, and once when I had repacked all my tax free cigs and booze. Luckily, I saved the plastic bags.