Travel Tray - Large. It holds things easier. I find the small one too fiddly.
Shop Bags are infinitely useful. I like the large ones better than the small ones. It's also a great way to try out all the colors.
A30 in ballistic. I've traveled for a week using an A30 and didn't even fill it up. It was also about as heavy as I could carry. The A45 is just too big and heavy. I want wheels if I'm going for a bag the size of an A45.
I also like my ballistic WF even better than my A30.
And I love my Medium Road duffle (aka Doggienaut36, D36) even more than the A30. It's just that little bit bigger than the A30, but doesn't have backstraps, which I don't use anyway. It's much lighter than the A30, but holds more.
I have both SE and SK. I like the SK better for an everyday purse, but the SE fits nicely in the front pocket of my Pilot. So, if I'm traveling with my Pilot, I'll bring my SE as my travel purse. If I need to carry more stuff, I'll use my SK, and it fits in the end pockets of my A30 and D36 with room to spare.