I'd vote for samsonite and Kirkland(Costco)
excellent products.

A carryon luggage is good if:

- Its light
- survives the rain well
- strong enough to survive
sharp corners (if checked in for any reasons)
- not overloaded with million pockets and compartments.
It should be space efficient.

I think above two are excellent choices.
For past couple of years, I've dumped the roller bags
and adopted simple duffle bag. (no compartments
no wheels and has an excellent padded shoulder strap.)

I got this one from ebags.

never had to check it in.. even in the ERJs or CRJs.