For my Tech V 23b kit, I'm using the Urban Disguise 50. It can hold the camera sideways with grip and finder attached, and I think I've fit six lenses in there including the one on the camera, groundglass back and a rollfilm holder or a few Grafmatics, the usual accessories, and a laptop when I'm traveling. Depending on what non-photographic things you travel with, you could fit another rollfilm back, or if you don't need the laptop pocket for a laptop, it could hold quite a few filmholders, and there are side stretch pockets for things like bottles of water or a flash. It's a very smartly designed bag, also with a convenient hidden pocket for travel documents that's easy to reach with the bag on your shoulder, and other handy features.
When I have a laptop in the case (usually because I'm traveling on a plane), I usually leave the groundglass back on the camera, because it makes a slimmer package that isn't likely to protrude and crack the laptop screen, but when the laptop slot is empty, I usually leave a rollfilm back on, so I can just grab the camera, unfold, attach the cable release and shoot.