Just the other day I was looking at the Lowepro DryZone 200 and was
wunderin the same thing.  I suppose we could drag our stuff to the store
and if it all fits, we commit.

http://www.lowepro.com/Products/Backpacks/waterproof/DryZone_200.aspx

    One trick to get more into a bag (if you have two or more fairly
short lenses), is to glue two of the back caps together.  The knurling
on the Nikon back caps interlocks, and I've glued them together by
holding them together, and dripping a light run of MEK (Methyl Ethyl
Keytone) onto the point of joining, then separating them slightly to let
it run between the two, and pressing together again.  Hold it together
for perhaps fifteen minutes (light spring clamps work well for this, and
it is then together forever, or until you physically break it.

    This allows two shorter lenses to be stored on end in a camera
bag in a single storage compartment.  In my case, it is a 20mm f2.8 and
a 16mm f3.5 -- both are AI and need manual exposure setting.  I can do
the same with the 50mm f1.4 and the "28-105mm f3.5-4.5 D", so I expect
the 18-70mm "kit" lens (when I get it) to work well on this same sort of
arrangement.

    The 180mm f2.8 (Also AI, but converted to CPU for auto exposure)
is as tall as the two lenses combined.

    I use all of the above with a D70, but the probable difference
is that I keep the camera body and one lens out of the bag, so it holds
the SB-800 flash, the stack of two lenses, the 180mm f2.8, and whichever
of the 50mm f1.4 or 28-105mm zoom is to on the body at the time, along
with the charger and power cord, and a spare battery (in a film loop in
the lid).
   
    In addition, a handheld meter in the front zipper compartment.
All of these fit in a LowePro Elite III with no problem, but to hold a
tripod and a collection of filters, I've gone to a somewhat larger kiwi
bag which I already had around the house.

    I would suggest keeping the LowePro, and using it for carrying a
subset of all of your lenses for when you know that you won't need them
all -- just to make the load lighter.

    One thing about the Kiwi, however, which makes carrying a larger
load easier (including a tripod strapped to the case) is that it has a
belt to hold the case to the body, so it does not swing around as you
walk and climb over obstacles.

    Enjoy,
        DoN.

I reckon an old cheap looking but funtional bag is the way to go.  Just
remember not to store your camera equipment in it after use.
Some of the bags that I see with foam in them are a very bad idea for
camera storage.  They get wet from a little rain, then they get dumped
camera, lenses and all in a cupboard, take days or weeks to dry out, and
act as a fairly perfect incubator for growing fungus.
I found a couple of old nikkor lenses in my basement that I had more of
less forgotten about for 15 years.  I sold one - it was stored loose in
the bottom of a cardboard carton, and was perfect.  The other was in a
genuine padded lens case - and if lens fungus had the value per kg as
black truffles, this one would have been priceless.

I,m using a LowePro Stealth Reporter 500AW with my D70 kit and it works well
so far....
D70 + 18-70
AF80-200 f2.8ED
AF50 f1.4
2 x batts + charger
cleaning kit, 2 x CF, CF reader, notebook, pens. maglite..

Still room for a flash....

Guy

Kata R-103 or Kata R-102

I've got a Lowepro Comutreker, and it's a great backpack, one of the
features I like is if you run out of space inside you can just add another
Lowepro pouch to the outside.

-SL

I use a LowePro 5 (Nova?) for two bodies and 5 lenses, 2 lasrge
flashes, and the usual assortment of large diameter filters, fil, and
doo-dads of all kinds.  Two of the lenses in there are quite large
(80-200 f/2.8 and 28-70 f/2.8).

I keep my equipment in there all of the time, so I just need to 'tune'
what is in there according to whatever outing I'm on.

I keep thinkig of a new bag but to date I haven't found the right one.

Cheers,
Alan