[G4] upgrading dual processors from 867 to 1ghz

[Dave Vega]

Hello all,

I'm fairly new to the mac world and still learning quite a bit. I
recently purchased a used powermac g4 dual 867 mhz MDD. i was
wondering if it's possible (and worth the price and effort) to upgrade
the processors to 1 ghz or 1.25 ghz. Is there  a significant
difference in performance between 867 and the 1ghz chips? if so, does
it make more sense to sell my current system and purchase a newer
model, or upgrade my current box?

Any/all opinions, comments, etc are appreciated!

Thanks!

-Dave