Up to date TOPO maps? (Oregon)

Hi all,

I recently got a bluetooth GPS to use with laptop/iPAQ. Works great for
streets but I'd like to get some good topo maps for hiking, etc. So far I
haven't found a good source of up to date maps for a reasonable price. I
can't tell whether the National Geographic TOPO Oregon or DeLorme Western
States would be any good.

Any recommendations?

Thanks,
Andrew