Right now I only have the P10 and P16, and I use 3 of the Pelican cases for them. I have a few other Pelican cases that I use for my photography gear. I have two 1010s (one for each PV) for the days that I decide to only take one of them with me. The 1040 is reserved for weekend trips; I have it set up to hold the P10, P16, five 10440 batts, four 16340 batts, and 16 cartos (I left enough room to expand that to 32 cartos).
The P10 is perfect for stealth vaping because of its size, but I only get about 2 hours with the IMRs. The P16 IMO is the best compromise of size and battery life. I get around 4 hours from the 16340 IMRs and close to 6 hours from the CR123s; I prefer the IMRs though. I plan on picking up a P18 soon, but I'm waiting for David to be less busy so that he can accommodate for some of the special requests that I have. I also want a Shockwave when he releases it, but that won't be for a few months.