versatile bag

[dafnis]

I'm going in just over a month two weeks to Greece.
Currently I own a Lowepro Rezo 170 with the gear you can see below in the signature. I also have some extra accessories (filters, etc.), and a soon to receive Epson P-4500 :-).

On trips normally I also bring a couple of guidebooks to get everything well covered, which so far I have been carrying in a small bag.

Now my question is, which bag would you recommend me with both photo compartments, and also some space for a couple of guidebooks?
I've seen the Lowepro Orion trekker but don't know how handy it is to get the photo equipment, I change lenses quite a lot.
After all, I love the topload opp my Rezo 170 gives me, but am very limited in space with that one.
My computrekker plus is way too big for this trip so that one does not count...

Comments? Other suggestions?

Thanks!

[Jon]

I'm taking my Domke F-802 when I go in about a month. 5D, 20D, 24-70, 70-200, 580EX, filters & batteries, and Libretto. Pick up the separate pockets (F-901, F-902) for your guidebooks and the 3-compartment insert and you're set.