I'm looking for a bigger camera bag. Something good and solid (I'm going to buy it used

)
In the bag I will have
1) k10d
2) DA 14MM
3) DA 40mm Limited (I don't have it yet

)
4) DA telephoto something might be 50-300mm
5) extra battery, external flash
6) some small stuff
thank you.
P.S. what is the price range for a good bag or bag pack?