Recommended bag for Travel Kit.

Okay, I know that the bag bit is not Pentax related, but what will go inside it will be

So, currently I have a number of bags and backpacks for my kit, depending on where I am going.
I have the following:-
Lowepro Mini-Trekker AW backpack
Lowepro Sling 222 AW
Lowepro Orion Trekker
Cheap Jessops Camera bag, initally to hold my MF camera, but not that good.

For City breaks I am looking for something less obvious, but enable to hold the following:-
Pentax K-5 and Grip
DA 21mm Limited
DA 35 F2.4
DA 40mm Limited
FA 50mm F1.4
K 55mm F1.8
MZ-5n body
Either DA*50-135mm, 55-300mm or Sigma 105mm Macro.
Lumix LX-5 compact camera.
Couple of rolls of film
Several Cards
Some filters and filter holder.
Obviously a document pocket will be a boon too.
As you can see, most of the lenses are tiny and could be stacked so it does'nt have to be that big, just big enough.
Thoughts?

That's an unobtrusive kit?

Seriously, I travel as light as possible, but for quite large amounts of kit stil recommend the Billingham Hadley Pro. You might need the Hadley Large, but the principle is the same.

1. Unobtrusive design.
2. Very water resistant.
3. Easy access to equipment.
4. Thin profile so bag hugs the body and is comfortable and compact to carry.
5. No wasted space.
6. Excellent equipment protection.

Best choice? Lowepro Primus AW... :

1. Unobtrusive design. YES
2. Very water resistant. YES
3. Easy access to equipment. DOUBLE YES
4. Thin profile so bag hugs the body and is comfortable and compact to carry. YES
5. No wasted space. YES (depends on)
6. Excellent equipment protection. YES

How I´ve said, the BEST