I have not found expensive luggage to be worth the cost. I buy "acceptable" quality stuff (Samsonite and American Tourister are available) at TJ Maxx. It's usually heavily discounted and serves me well. Unless the luggage is really bottom-tier, the things that eventually kill it (a wheel caught in the baggage handling machinery or snapped off when dropped from the belt) are random events and just as likely to kill a high-dollar bag as a middle-of-the-road one. I'm not trying to make a fashion statement or impress the bellhop, I just want the luggage to get stuff safely from Point A to Point B, and a less flashy bag might even be less likely to be a target for theft.
Spinners: I didn't like mine, went back to a conventional "roller." Spinners are okay if all the travel is on very smooth surfaces, but a regular "roller' with large wheels works much better on rougher stuff (asphalt, etc). And the spinner wheels and casters are more susceptible to damage.
Light/bright colored luggage looks bad after one or two trips. Go with a dark color, add a ribbon or big tag if you want it to stand out on the baggage belt.
Warranties: As someone who has tried to get something fixed, it's usually not worth the trouble to document your purchase, mail a bag somewhere, pay their "handling charge" for the "free" repair, etc.
Any bag is is going to look bad and wear out after hard use. Consider them expendable items.