Sweet. I too, am intrigued by those shell holders. I'm a bandoleer man myself - 5 slugs, 5 OO, and 15 #4 is my layout. If I'm truly bugging out, I'll probably load the 870 with 00 as well. Mine also has a Surefire lamp attached, giving me another source of light if needed.
I have a Ruger 10/22 for small game, though a recent range session showed that my new sights are WAY off (4-5" high at 25 yards). I know that the pro/con of a .22 vs .177 has been debated, by my choice is simple - my air rifle is at my parents house in CA, and I'm living in MI! Problem solved.
Nice pics, and beautiful weapons!