If you fly with your prospective rolling camera bag…
Just remember that while it’s a great bag, the LOWEPRO PROROLLER X200 has an external Lineal of 51.1” [exceeds FAA 45” carry-on limits from approx 2009] & is heavy 13.2 lbs!
Bag inner capacity of X200 is 1594 cubic inch .
THINK TANK AIRPORT INTERNATIONAL V2.0 of 1563 cubic inch(with an external Lineal of 43”; within FAA 45” ) with virtually the same inner cubic content. Weight: 9.5-11.5lbs.
Airlines rules of today are sometimes not the rules of tomorrow - I found that out over the years the hard way, as my Lowepro ProRoller X200 which was many years ago fine for carry-on, is now offside on many airlines!
PELICAN are great, if your primary stated criteria(s) is light rain/water resistant; (I own one of those too), but I find them bulky & heavy.
Like almost any aspect of photography equipment, you pay if you want your equipment light-weight &/or compact.
Just one perspective and some things to consider, good luck…
P.S. My vote would be for the Think Tank Airport INTERNATIONAL V2.0(if fly internationally), or SECURITY(if only domestic) depending on your capacity requirements.