There are a few high quality bags & kits out there.
I used a great plastic lockable MTM case with 2 sections.
For nylon or fabric bags, I'd check these popular models; Maxpedition, 5.11 Tactical, Blackhawk, VooDoo Tactical, CSM Gear.
For firearms, I highly suggest a Bore-Store bag to protect them from rust & damage(nicks, scuffs, etc).
For ordering see; www.uscav.com www.galls.com www.policehq.com www.blackhawk.com www.midwayusa.com www.natchezss.com
NOTE; some "armed professionals" prefer the low profile range bags w/o decals or logos. It may prevent thefts or any hassles when you travel.