First off, I love the Samsonite spinner technology.  This is my second such suitcase and I will never buy a different kind.  It's easy to push when full, and can be pulled or pushed around upright.  My four year old was pushing this around for me.  It's that easy.

This model is perfect.  The size holds about 50 lbs, which is what most airlines restrict.  So going much bigger is kind of pointless.  It's better than their past spinner model that I had because there is nothing to get caught or tear on the outside.  My previous one had a glued and sewed on label that got caught and ripped.  The bag was still useful, but it didn't look great.

As to the color...  it's obviously a personal choice.  It's bright, and easy to find.  It's somewhat light colored, so black marks will show a little, but I think if you get any color other than black, that's going to be an issue.

Recommended without reservation.  It really is that awesome.